docs+docker: Complete documentation infrastructure with Docker automation testing (#2)

* fix: Remove invalid colon in bash else statement

- Fix bash syntax error in auto-version workflow
- Remove Python-style colon from else statement
- Resolves exit code 127 in version bump determination

🤖 Generated with [Claude Code](https://claude.ai/code)

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

* feat: Add Docker build combinations for non-versioning prefixes

- Add support for prefix+docker combinations (docs+docker:, chore+docker:, etc.)
- Enable Docker build for non-versioning changes when requested
- Add repository_dispatch trigger for Docker workflow
- Update Docker tagging for PR-based builds (pr-X, main-sha)
- Update PR template with new prefix options

This allows contributors to force Docker builds for documentation,
maintenance, and other non-versioning changes when needed.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

* docs: Add comprehensive PR prefix and automation documentation

- Update CONTRIBUTING.md with detailed PR prefix system explanation
- Add automation workflow documentation to docs/contributing/workflows.md
- Create new user-friendly contributing guide at docs/user-guides/contributing-guide.md
- Include Mermaid diagrams for workflow visualization
- Document Docker testing combinations and image tagging strategy
- Add best practices and common mistakes to avoid

This provides clear guidance for contributors on using the automated
versioning and Docker build system effectively.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

---------

Co-authored-by: Patryk Ciechanski <patryk.ciechanski@inetum.com>
Co-authored-by: Claude <noreply@anthropic.com>

.github/pull_request_template.md

@@ -2,16 +2,27 @@
 
 **Please ensure your PR title follows one of these formats:**
 
+### Version Bumping Prefixes (trigger Docker build + version bump):
 - `feat: <description>` - New features (triggers MINOR version bump)
 - `fix: <description>` - Bug fixes (triggers PATCH version bump)
 - `breaking: <description>` or `BREAKING CHANGE: <description>` - Breaking changes (triggers MAJOR version bump)
 - `perf: <description>` - Performance improvements (triggers PATCH version bump)
 - `refactor: <description>` - Code refactoring (triggers PATCH version bump)
-- `docs: <description>` - Documentation only (no version bump)
-- `chore: <description>` - Maintenance tasks (no version bump)
-- `test: <description>` - Test additions/changes (no version bump)
-- `ci: <description>` - CI/CD changes (no version bump)
-- `style: <description>` - Code style changes (no version bump)
+
+### Non-Version Prefixes (no version bump):
+- `docs: <description>` - Documentation only
+- `chore: <description>` - Maintenance tasks
+- `test: <description>` - Test additions/changes
+- `ci: <description>` - CI/CD changes
+- `style: <description>` - Code style changes
+
+### Docker Build Options:
+- `docker: <description>` - Force Docker build without version bump
+- `docs+docker: <description>` - Documentation + Docker build
+- `chore+docker: <description>` - Maintenance + Docker build
+- `test+docker: <description>` - Tests + Docker build
+- `ci+docker: <description>` - CI changes + Docker build
+- `style+docker: <description>` - Style changes + Docker build
 
 ## Description