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

server/client.go

@@ -0,0 +1,79 @@
+package server
+
+import (
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/rs/zerolog/log"
+	"github.com/urfave/cli/v3"
+	"golang.org/x/net/proxy"
+	"golang.org/x/oauth2"
+
+	"go.woodpecker-ci.org/woodpecker/v3/woodpecker-go/woodpecker"
+)
+
+type Client interface {
+	woodpecker.Client
+}
+
+// NewClient returns a new client from the CLI context.
+func NewClient(ctx context.Context, c *cli.Command) (Client, error) {
+	var (
+		skip        = c.Bool("skip-verify")
+		socks       = c.String("socks-proxy")
+		socksoff    = c.Bool("socks-proxy-off")
+		serverToken = c.String("server-token")
+		serverURL   = c.String("server-url")
+	)
+	serverURL = strings.TrimRight(serverURL, "/")
+
+	if len(serverURL) == 0 {
+		return nil, fmt.Errorf("please provide the woodpecker server address")
+	}
+	if len(serverToken) == 0 {
+		return nil, fmt.Errorf("please provide a woodpecker access token")
+	}
+
+	// attempt to find system CA certs
+	certs, err := x509.SystemCertPool()
+	if err != nil {
+		log.Error().Err(err).Msg("ca certs not found")
+	}
+	tlsConfig := &tls.Config{
+		RootCAs:            certs,
+		InsecureSkipVerify: skip,
+	}
+
+	config := new(oauth2.Config)
+	client := config.Client(
+		ctx,
+		&oauth2.Token{
+			AccessToken: serverToken,
+		},
+	)
+
+	trans, _ := client.Transport.(*oauth2.Transport)
+
+	if len(socks) != 0 && !socksoff {
+		dialer, err := proxy.SOCKS5("tcp", socks, nil, proxy.Direct)
+		if err != nil {
+			return nil, err
+		}
+		trans.Base = &http.Transport{
+			TLSClientConfig: tlsConfig,
+			Proxy:           http.ProxyFromEnvironment,
+			Dial:            dialer.Dial,
+		}
+	} else {
+		trans.Base = &http.Transport{
+			TLSClientConfig: tlsConfig,
+			Proxy:           http.ProxyFromEnvironment,
+		}
+	}
+
+	return woodpecker.NewClient(serverURL, client), nil
+}