services: add mood, moodtracker, overleaf, personal-sensing; update ollama

Compose and supporting code for four services that had been running or
prototyped without their config tracked here, per the repo convention that
agap_git holds the compose + config while application source lives in each
service's own Gitea repo.

Only placeholder credentials are included: mood/.env.example and
moodtracker/.env.example ship dummy values, and overleaf/variables.env carries
app name and feature flags only. Real values stay in Vaultwarden.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

overleaf/.gitignore

@@ -0,0 +1,16 @@
+# Runtime data and temporary files
+data/
+*.bak*
+
+# Docker compose overrides
+docker-compose.override.yml
+
+# Nginx configuration (only used with NGINX_ENABLED=true)
+config/nginx/
+
+# TLS certificates (only used with NGINX_ENABLED=true)
+config/certs/
+
+# Logs and temporary files
+logs/
+*.log