feat: add gitea-deploy skill, tools, and sdlc foreground service rule

- skills/gitea-deploy/: new skill for Gitea deployment automation
- tools/: shared utility scripts
- skills/sdlc/SKILL.md: add Foreground Service Rule for long-running
  processes (background start + readiness polling pattern)

.kiro/agents/gitea-deploy.json

@@ -0,0 +1,11 @@
+{
+  "name": "gitea-deploy",
+  "description": "Deploys a self-hosted Gitea Git server on a VPS using Docker and pushes the current project to it. Use when you want to self-host git, set up Gitea on a VPS, or push a project to a private Git server.",
+  "prompt": "file://prompts/gitea-deploy.md",
+  "tools": ["execute_bash", "fs_read", "fs_write"],
+  "allowedTools": ["fs_read"],
+  "resources": [
+    "skill://.kiro/skills/gitea-deploy/SKILL.md"
+  ],
+  "welcomeMessage": "Ready to deploy Gitea on your VPS. Tell me your VPS host, SSH user, and key path to get started."
+}