Implement initial BookWyrm role

- Removed obsolete TODO.md
- Added config/main.yml with service, feature, CSP, and registration settings
- Added schema/main.yml defining vaulted SECRET_KEY (alphanumeric)
- Added tasks/main.yml to load stateful stack
- Added Dockerfile.j2 ensuring data/media dirs
- Added docker-compose.yml.j2 with application, worker, redis, volumes
- Added env.j2 with registration, secrets, DB, Redis, OIDC support
- Extended vars/main.yml with BookWyrm variables and OIDC, Docker, Redis settings
- Updated meta/main.yml with logo and run_after dependencies

Ref: https://chatgpt.com/share/68b6c060-3a0c-800f-89f8-e114a16a4a80

roles/web-app-bookwyrm/tasks/main.yml

@@ -0,0 +1,7 @@
+---
+- block:
+  - name: "load docker, db/redis and proxy for {{ application_id }}"
+    include_role:
+      name: sys-stk-full-stateful
+  - include_tasks: utils/run_once.yml
+  when: run_once_web_app_bookwyrm is not defined