docs(reference-ansible): add docs/ tree and document repo, playbooks, Makefile

Addresses the WKS PoC review (Notion 2026-05-26). All docs in English.
- README: purpose, docs table of contents, annotated repo tree
- docs/getting_started.md: prerequisites (WKS account, OIDC, SSH, VPN) + first deploy
- docs/ansible.md: playbook table, "Running Ansible", service parameters, cheatsheet
- docs/secrets.md: canonical Bao login (moved out of README) + demo defaults
- docs/operations.md: full Makefile reference
- docs/inventories.md: repo layout, topology, standard folder structure, walkthrough
- docs/testing.md: static checks, inventory resolution, smoke test / dry run
- remove ARCHITECTURE.md (architecture docs live externally)

Also includes the gymburgdorf inventory build-out (bookstack, homarr,
opnform, send) and scripts/bao-seed.sh.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

playbooks/site.yml

@@ -65,17 +65,29 @@
   roles:
     - digitalboard.core.drawio
 
-# - name: Deploy send service
-#   hosts: send_servers
-#   become: yes
-#   roles:
-#     - digitalboard.core.send
+- name: Deploy send service
+  hosts: send_servers
+  become: yes
+  roles:
+    - digitalboard.core.send
 
-# - name: Deploy openforms service
-#   hosts: openforms_servers
-#   become: yes
-#   roles:
-#     - digitalboard.core.openforms
+- name: Deploy opnform service
+  hosts: opnform_servers
+  become: yes
+  roles:
+    - digitalboard.core.opnform
+
+- name: Deploy homarr service
+  hosts: homarr_servers
+  become: yes
+  roles:
+    - digitalboard.core.homarr
+
+- name: Deploy bookstack service
+  hosts: bookstack_servers
+  become: yes
+  roles:
+    - digitalboard.core.bookstack
 
 - name: Deploy opencloud service
   hosts: opencloud_servers