feat: add Timeweb Cloud provider for Woodpecker CI autoscaler

- Implement timewebcloud provider with DeployAgent, RemoveAgent, ListDeployedAgentNames
- Add minimal HTTP API client for Timeweb Cloud (create/list/delete servers)
- Register provider in main.go with CLI flags
- Add timeweb-list and timeweb-tester utilities
- Include Dockerfile and docker-compose.yml for deployment
- Update DEPLOY.md with verified OS/preset IDs

.gitignore

@@ -0,0 +1,8 @@
+woodpecker-autoscaler
+timeweb-list
+timeweb-tester
+timeweb-debug
+*.exe
+*.test
+*.out
+.DS_Store