Add Gitea Actions CI and release workflows and deployment assets

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

deploy/docker-compose.yml

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+# Run Bamboo with Docker inside your home or private network:
+#   cp .env.example .env     (then set BAMBOO_HAMMERHEAD and BAMBOO_TOKEN)
+#   docker compose up -d
+#
+# Bamboo only makes outbound connections, so nothing needs opening. Host networking
+# lets it reach services on this machine (127.0.0.1) as well as the rest of your LAN;
+# switch it off if your targets are all on other machines.
+services:
+  bamboo:
+    image: git.veillax.com/veillax/bamboo:latest
+    restart: unless-stopped
+    network_mode: host
+    env_file: .env
+    volumes:
+      - bamboo-data:/data
+      # To list this machine's Docker containers as targets (BAMBOO_DOCKER=1), share the
+      # socket and let the container's user read it (find the group id: getent group docker):
+      # - /var/run/docker.sock:/var/run/docker.sock:ro
+    # group_add:
+    #   - "999"
+
+volumes:
+  bamboo-data: