fix: feat: end-to-end disinto init smoke test in CI (#668)

Add tests/smoke-init.sh — an end-to-end smoke test that runs
disinto init --bare --yes against a real Forgejo instance
(started as a Woodpecker service container).

The test validates:
- Forgejo API responds after init
- Admin and bot users created with tokens
- Repo created with labels on Forgejo
- Project TOML generated correctly
- .env written with FORGE_TOKEN and FORGE_REVIEW_TOKEN
- Cron entries installed (dev-poll, review-poll, gardener)

Uses mock binaries for docker (routes user creation to Forgejo
admin API), claude, tmux, and crontab to run in CI without
Docker-in-Docker.

Wired into CI via .woodpecker/smoke-init.yml (separate pipeline
with Forgejo service, runs on push and pull_request).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.woodpecker/smoke-init.yml

@@ -0,0 +1,24 @@
+# .woodpecker/smoke-init.yml — End-to-end smoke test for disinto init
+#
+# Starts a real Forgejo instance as a service container, then runs
+# disinto init --bare --yes against it and verifies the results.
+
+when:
+  event: [push, pull_request]
+
+services:
+  - name: forgejo
+    image: codeberg.org/forgejo/forgejo:11.0
+    environment:
+      FORGEJO__database__DB_TYPE: sqlite3
+      FORGEJO__server__ROOT_URL: "http://forgejo:3000/"
+      FORGEJO__server__HTTP_PORT: "3000"
+
+steps:
+  - name: smoke-init
+    image: debian:bookworm-slim
+    environment:
+      SMOKE_FORGE_URL: http://forgejo:3000
+    commands:
+      - apt-get update -qq && apt-get install -y -qq --no-install-recommends bash curl jq python3 git ca-certificates >/dev/null 2>&1
+      - bash tests/smoke-init.sh