Initial scaffold: API service, K8s operator, and CRDs

Forgebot is a K8s operator + API service for dispatching AI agent
jobs from git forge commands. Includes:

- CRDs: AgentPool, AgentTask, ProviderQueue, RepositoryBinding
- API server with webhook handler, task queue, and comment proxy
- Operator controllers for task scheduling and job management
- Gitea provider with webhook parsing and signature verification
- PostgreSQL database with auto-migration
- Woodpecker CI pipelines and multi-stage Dockerfiles

config/samples/agentpool.yaml

@@ -0,0 +1,21 @@
+---
+apiVersion: forgebot.unkin.net/v1alpha1
+kind: AgentPool
+metadata:
+  name: default-pool
+  namespace: forgebot
+spec:
+  model: claude-sonnet-4-20250514
+  endpoint: https://litellm.k8s.syd1.au.unkin.net
+  maxConcurrent: 3
+  image: git.unkin.net/unkin/agent-dev:latest
+  resources:
+    requests:
+      cpu: 500m
+      memory: 1Gi
+    limits:
+      cpu: "2"
+      memory: 4Gi
+  credentialSecretRef:
+    name: litellm-api-key
+  serviceAccountName: forgebot-agent