docs: rewrite README with structured overview and quick start guide

Replaces the minimal project description with a comprehensive README
including a component overview table, quick start instructions, common
Ansible operations, and links to detailed documentation. Aligns with
Red Panda Approval™ standards.

ansible/casdoor/app.conf.j2

@@ -0,0 +1,154 @@
+# -----------------------------------------------------------------------------
+# Casdoor Application Configuration
+# -----------------------------------------------------------------------------
+# Generated by Ansible - do not edit manually
+# See: https://casdoor.org/docs/basic/server-installation
+# -----------------------------------------------------------------------------
+
+appname = casdoor
+httpport = {{ casdoor_port | default(8000) }}
+runmode = {{ casdoor_runmode | default('prod') }}
+copyrequestbody = true
+
+# -----------------------------------------------------------------------------
+# Database Configuration
+# -----------------------------------------------------------------------------
+# Connects to native PostgreSQL on localhost (deployed by postgresql_ssl playbook)
+
+driverName = postgres
+dataSourceName = user={{ casdoor_db_user }} password={{ casdoor_db_password }} host=localhost port={{ casdoor_db_port | default(5432) }} sslmode={{ casdoor_db_sslmode | default('disable') }} dbname={{ casdoor_db_name }}
+dbName = {{ casdoor_db_name }}
+tableNamePrefix =
+showSql = {{ casdoor_showsql | default('false') }}
+
+# -----------------------------------------------------------------------------
+# Cache Configuration
+# -----------------------------------------------------------------------------
+
+redisEndpoint = {{ casdoor_redis_endpoint | default('') }}
+
+# -----------------------------------------------------------------------------
+# Storage Configuration
+# -----------------------------------------------------------------------------
+# OCI Object Storage via S3-compatible API
+
+defaultStorageProvider = {{ casdoor_default_storage_provider | default('') }}
+{% if casdoor_s3_endpoint is defined and casdoor_s3_endpoint %}
+storageProvider = {
+  "owner": "admin",
+  "name": "oci-s3",
+  "createdTime": "",
+  "displayName": "OCI Object Storage",
+  "category": "Storage",
+  "type": "AWS S3",
+  "subType": "",
+  "method": "",
+  "clientId": "{{ casdoor_s3_access_key }}",
+  "clientSecret": "{{ casdoor_s3_secret_key }}",
+  "clientId2": "",
+  "clientSecret2": "",
+  "cert": "",
+  "customAuthUrl": "",
+  "customScope": "",
+  "customTokenUrl": "",
+  "customUserInfoUrl": "",
+  "customLogo": "",
+  "scopes": "",
+  "userMapping": null,
+  "host": "",
+  "port": 0,
+  "disableSsl": false,
+  "title": "",
+  "content": "",
+  "receiver": "",
+  "regionId": "{{ casdoor_s3_region | default('ca-toronto-1') }}",
+  "signName": "",
+  "templateCode": "",
+  "appId": "",
+  "endpoint": "https://{{ casdoor_s3_endpoint }}",
+  "intranetEndpoint": "",
+  "domain": "{{ casdoor_s3_bucket }}",
+  "bucket": "{{ casdoor_s3_bucket }}",
+  "pathPrefix": "",
+  "metadata": "",
+  "idP": "",
+  "issuerUrl": "",
+  "enableSignAuthnRequest": false,
+  "providerUrl": ""
+}
+{% endif %}
+
+# -----------------------------------------------------------------------------
+# Security Configuration
+# -----------------------------------------------------------------------------
+
+isCloudIntranet = false
+authState = {{ casdoor_auth_state | default(casdoor_secret_key) }}
+socks5Proxy = 
+verificationCodeTimeout = 10
+initScore = 0
+logPostOnly = true
+isUsernameLowered = false
+
+# -----------------------------------------------------------------------------
+# Origin Configuration
+# -----------------------------------------------------------------------------
+# Must match the external URL used to access Casdoor
+
+origin = {{ casdoor_origin }}
+originFrontend = {{ casdoor_origin_frontend | default(casdoor_origin) }}
+staticBaseUrl = "https://cdn.casbin.org"
+
+# -----------------------------------------------------------------------------
+# Application Settings
+# -----------------------------------------------------------------------------
+
+isDemoMode = false
+batchSize = 100
+enableErrorMask = true
+enableGzip = true
+
+# Session timeout in minutes
+inactiveTimeoutMinutes = {{ casdoor_inactive_timeout_minutes | default(60) }}
+
+# -----------------------------------------------------------------------------
+# Theme Configuration
+# -----------------------------------------------------------------------------
+
+themeData = {"themeType": "default", "colorPrimary": "#ffa415", "borderRadius": 6, "isCompact": false}
+
+# -----------------------------------------------------------------------------
+# LDAP Configuration
+# -----------------------------------------------------------------------------
+
+ldapServerPort = {{ casdoor_ldap_server_port | default(0) }}
+ldapsCertId = {{ casdoor_ldaps_cert_id | default('') }}
+ldapsServerPort = {{ casdoor_ldaps_server_port | default(0) }}
+
+# -----------------------------------------------------------------------------
+# RADIUS Configuration
+# -----------------------------------------------------------------------------
+
+radiusServerPort = {{ casdoor_radius_server_port | default(0) }}
+radiusDefaultOrganization = {{ casdoor_radius_default_organization | default('built-in') }}
+radiusSecret = {{ casdoor_radius_secret | default('') }}
+
+# -----------------------------------------------------------------------------
+# Resource Quotas
+# -----------------------------------------------------------------------------
+
+quota = {"organization": -1, "user": -1, "application": -1, "provider": -1}
+
+# -----------------------------------------------------------------------------
+# Logging Configuration
+# -----------------------------------------------------------------------------
+
+logConfig = {"adapter":"console"}
+
+# -----------------------------------------------------------------------------
+# Initialization
+# -----------------------------------------------------------------------------
+
+initDataNewOnly = true
+initDataFile = "/conf/init_data.json"
+frontendBaseDir = "../cc_0"