refactor: update project references from Agathos to Ouranos across documentation and configuration files

ansible/sandbox_up.yml

@@ -1,5 +1,5 @@
 ---
-- name: Start Agathos Sandbox Uranian Hosts
+- name: Start Ouranos Sandbox Uranian Hosts
   hosts: localhost
   gather_facts: false
   vars:
@@ -16,7 +16,7 @@
   tasks:
     - name: Start Uranian host containers
       ansible.builtin.command:
-        cmd: incus start {{ item }} --project agathos
+        cmd: incus start {{ item }} --project ouranos
       loop: "{{ uranian_hosts }}"
       register: start_result
       failed_when: start_result.rc != 0 and 'already running' not in start_result.stderr