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

go.mod

@@ -0,0 +1,28 @@
+module go.woodpecker-ci.org/autoscaler
+
+go 1.26.0
+
+toolchain go1.26.3
+
+require (
+	github.com/joho/godotenv v1.5.1
+	github.com/rs/zerolog v1.35.1
+	github.com/stretchr/testify v1.11.1
+	github.com/urfave/cli/v3 v3.9.0
+	go.woodpecker-ci.org/woodpecker/v3 v3.14.1
+	golang.org/x/net v0.54.0
+	golang.org/x/oauth2 v0.36.0
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/rogpeppe/go-internal v1.11.0 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
+	golang.org/x/sys v0.44.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)