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

docker/Dockerfile

@@ -0,0 +1,18 @@
+FROM --platform=$BUILDPLATFORM golang:1.26 AS build
+
+WORKDIR /src
+COPY . .
+ARG TARGETOS TARGETARCH
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg \
+    make build
+
+FROM --platform=$BUILDPLATFORM scratch
+ENV GODEBUG=netdns=go
+
+# copy certs from build image
+COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+# copy agent binary
+COPY --from=build /src/dist/woodpecker-autoscaler /bin/
+
+ENTRYPOINT ["/bin/woodpecker-autoscaler"]

docker/Dockerfile.make

@@ -0,0 +1,27 @@
+# docker build --rm -f docker/Dockerfile.make -t woodpecker/make:local .
+FROM docker.io/golang:1.26-alpine AS golang_image
+FROM docker.io/node:24-alpine
+
+RUN apk add --no-cache --update make gcc binutils-gold musl-dev && \
+    apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/main protoc && \
+  corepack enable
+
+# Build packages.
+COPY --from=golang_image /usr/local/go /usr/local/go
+COPY Makefile /
+ENV PATH=$PATH:/usr/local/go/bin
+ENV COREPACK_ENABLE_DOWNLOAD_PROMPT=0
+ENV COREPACK_ENABLE_AUTO_PIN=0
+
+# Cache tools
+RUN GOBIN=/usr/local/go/bin make install-tools && \
+    rm -rf /Makefile
+
+ENV GOPATH=/tmp/go
+ENV HOME=/tmp/home
+ENV PATH=$PATH:/usr/local/go/bin:/tmp/go/bin
+
+WORKDIR /build
+RUN chmod -R 777 /root
+
+CMD [ "/bin/sh" ]