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

providers/timewebcloud/flags.go

@@ -0,0 +1,47 @@
+package timewebcloud
+
+import (
+	"github.com/urfave/cli/v3"
+)
+
+const category = "Timeweb Cloud"
+
+var ProviderFlags = []cli.Flag{
+	&cli.StringFlag{
+		Name:     "timewebcloud-api-token",
+		Usage:    "Timeweb Cloud API JWT token",
+		Sources:  cli.EnvVars("WOODPECKER_TIMEWEBCLOUD_API_TOKEN"),
+		Category: category,
+	},
+	&cli.IntFlag{
+		Name:     "timewebcloud-os-id",
+		Usage:    "OS image ID to use for new servers (from GetOsList)",
+		Sources:  cli.EnvVars("WOODPECKER_TIMEWEBCLOUD_OS_ID"),
+		Category: category,
+	},
+	&cli.IntFlag{
+		Name:     "timewebcloud-preset-id",
+		Usage:    "Pricing preset ID (from GetServersPresets)",
+		Sources:  cli.EnvVars("WOODPECKER_TIMEWEBCLOUD_PRESET_ID"),
+		Category: category,
+	},
+	&cli.StringFlag{
+		Name:     "timewebcloud-availability-zone",
+		Usage:    "Availability zone for new servers",
+		Sources:  cli.EnvVars("WOODPECKER_TIMEWEBCLOUD_AVAILABILITY_ZONE"),
+		Category: category,
+	},
+	&cli.StringSliceFlag{
+		Name:     "timewebcloud-ssh-key-ids",
+		Usage:    "SSH key IDs to inject into new servers",
+		Sources:  cli.EnvVars("WOODPECKER_TIMEWEBCLOUD_SSH_KEY_IDS"),
+		Category: category,
+	},
+	// TODO: Deprecated remove in v2.0
+	&cli.StringFlag{
+		Name:     "timewebcloud-user-data",
+		Usage:    "timeweb cloud userdata template (deprecated)",
+		Sources:  cli.EnvVars("WOODPECKER_TIMEWEBCLOUD_USERDATA"),
+		Category: category,
+	},
+}