docs(releaser): release v1.5.1 — documentation site, fuzzing completeness

- Add Hugo + Geekdoc documentation site (docs/): installation, CLI
  reference, configuration, CI integration, and changelog pages; explicit
  menu bundle nav so all pages appear in the sidebar on every page
- Add Gitea CI workflow (.gitea/workflows/docs.yml): builds on push to
  main when docs/** changes, deploys minified site to gh-pages branch
- Add docs:setup / docs:serve / docs:build Taskfile tasks; theme bundle
  downloaded at build time (not committed)
- Add FuzzUpdate to internal/changelog and FuzzWriteVersion to
  internal/node to complete fuzz coverage for all file-rewriting packages
- Add fuzzing completeness guidelines to CLAUDE.md: authoritative table,
  exempt-package rationale, seed corpus rules

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/content/changelog.md

@@ -0,0 +1,59 @@
+---
+title: Changelog
+weight: 50
+---
+
+## v1.5.0 — 2026-07-11
+
+### Added
+
+- **Multi-module Maven support** — `maven.pom_paths: [...]` lists multiple `pom.xml` paths; overrides `pom_path`; each path is updated and committed in the same release commit
+- **Node.js `package.json` support** — opt-in via `node.package_json` (single path) or `node.package_jsons` (list); version bumped in-place alongside `pom.xml` and `CHANGELOG.md`
+- **`git.bump_rules` config** — controls which version component each commit type bumps: `breaking`, `feat`, `fix` each accept `"patch"` (default) or `"minor"`
+- **100% per-package statement coverage** across all 12 packages via injectable function vars
+
+### Changed
+
+- **`--pom` flag** now clears `maven.pom_paths` before setting `maven.pom_path`
+- **`version.Next()` signature** — accepts a bump-rules map as a sixth parameter; `nil` defaults to all-patch
+- **Verbose config table** — now includes `git.bump_rules.*`, `maven.pom_paths`, and `node.paths` rows
+
+## v1.4.0 — 2026-07-11
+
+### Added
+
+- **GitHub release support** — `internal/ghclient` package; configured via `github.token` + `github.repo`; GitHub takes precedence over GitLab when both are configured
+- **SSH agent push** — go-git `gitssh.NewSSHAgentAuth` for `git@` / `ssh://` remotes
+- **`--release-env-file` flag** — override dotenv artifact path; pass `""` to disable
+- **`git.releasable_types` config** — opt-in list of commit types that count as releasable
+- **CHANGELOG deduplication guard** — `changelog.Update()` is idempotent; skips write if section already exists
+
+## v1.3.0 — 2026-07-07
+
+### Added
+
+- **`release.env` dotenv artifact** — written on every real release containing `NEXT_VERSION=<tag>`; never committed; exposes the version to downstream GitLab CI jobs
+
+## v1.2.0 — 2026-07-07
+
+### Added
+
+- **`--verbose` flag** — prints config table, commit list with parsed types, and version decision
+- **Colored, structured CLI output** — `·` / `✓` / `!` prefix symbols; TTY-aware ANSI colors; respects `NO_COLOR` and `TERM=dumb`
+- **Name and version header** on every invocation
+
+### Changed
+
+- **Default `tag_prefix` is now empty** — bare version numbers (`1.2.3`) by default; add `tag_prefix: "v"` to opt in
+
+## v1.1.0 — 2026-07-07
+
+### Added
+
+- **CHANGELOG.md auto-update** — new dated section written on every release, grouped by commit type
+- **`--changelog-file` flag** — override changelog path
+- **`--init` flag** — scaffolds a fully-commented `.releaser.yml`
+
+## v1.0 and earlier
+
+See the [full CHANGELOG](https://git.k3nny.fr/releaser/src/branch/main/CHANGELOG.md) in the repository.