feat: rename rails/ to tools/ and add service tool suites

Rename the `rails/` directory to `tools/` for agent discoverability —
agents frequently failed to locate helper scripts due to the non-intuitive
directory name. Add backward-compat symlink `rails/ → tools/`.

New tool suites:
- Authentik: auth-token, user-list, user-create, group-list, app-list,
  flow-list, admin-status (8 scripts)
- Coolify: team-list, project-list, service-list, service-status, deploy,
  env-set (7 scripts)
- Woodpecker: pipeline-list, pipeline-status, pipeline-trigger (3 stubs)
- GLPI: session-init, computer-list, ticket-list, ticket-create, user-list
  (6 scripts)
- Health: stack-health.sh — stack-wide connectivity check

Infrastructure:
- Shared credential loader at tools/_lib/credentials.sh
- install.sh creates symlink + chmod on tool scripts
- All ~253 rails/ path references updated across 68+ files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

install.sh

@@ -144,6 +144,17 @@ mkdir -p "$TARGET_DIR/memory"
 chmod +x "$TARGET_DIR"/bin/*
 chmod +x "$TARGET_DIR"/install.sh
 
+# Ensure tool scripts are executable
+find "$TARGET_DIR/tools" -name "*.sh" -exec chmod +x {} + 2>/dev/null || true
+
+# Create backward-compat symlink: rails/ → tools/
+if [[ -d "$TARGET_DIR/tools" ]]; then
+  if [[ -d "$TARGET_DIR/rails" ]] && [[ ! -L "$TARGET_DIR/rails" ]]; then
+    rm -rf "$TARGET_DIR/rails"
+  fi
+  ln -sfn "tools" "$TARGET_DIR/rails"
+fi
+
 ok "Framework installed to $TARGET_DIR"
 
 step "Post-install tasks"