feat: complete rich text DSL documentation with typed date support

Add comprehensive documentation and typed date support for the Rich Text DSL,
bringing it to feature parity with page properties date handling.

## Features Added

- Add LocalDate, LocalDateTime, and Instant overloads to dateMention()
- Support for date ranges with all typed date variants
- Complete rich-text-dsl.md documentation with all examples
- Create RichTextExamples.kt integration test suite (13 tests)

## Documentation Updates

- Clarify distinction between standalone richText {} and block DSL contexts
- Add sections for colors, links, mentions, equations, and advanced formatting
- Document common patterns and gotchas with solutions
- Clean up README.md and docs/README.md (remove ARCHITECTURE/CONTRIBUTING refs)
- Add file-uploads.md to docs index

## Tests

- Add 8 unit tests for typed date mentions (all passing)
- Create 13 integration test examples validating all documentation
- Total: 481 unit tests passing

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

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

Author: jsaabel

README.md

@@ -106,7 +106,6 @@ See [docs/databases.md](docs/databases.md) and [docs/data-sources.md](docs/data-
 - **[Rich Text DSL](docs/rich-text-dsl.md)** - Working with formatted text
 - **[Error Handling](docs/error-handling.md)** - Understanding and handling errors
 - **[Testing](docs/testing.md)** - Testing your Notion integrations
-- **[Architecture](ARCHITECTURE.md)** - Design decisions and patterns (for contributors)
 
 ## Building from Source
 
@@ -165,11 +164,9 @@ Contributions are welcome! This project is in pre-release, so now is a great tim
 - Documentation improvements
 - Performance optimizations
 
-Please see [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.
-
 ## License
 
-This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+This project is licensed under the MIT License.
 
 ## Acknowledgments
 

docs/README.md

@@ -17,14 +17,14 @@
 
 ### Features
 - **[Rich Text DSL](rich-text-dsl.md)** - Format text with mentions, links, and more
+- **[File Uploads](file-uploads.md)** - Upload and manage files and images
 - **[Error Handling](error-handling.md)** - Handle API errors gracefully
 - **[Testing](testing.md)** - Test your Notion integrations
 
 ## Quick Links
 
 - [Main README](../README.md)
 - [Quick Start Guide](../QUICKSTART.md)
-- [Architecture Guide](../ARCHITECTURE.md)
 
 ## Understanding the 2025-09-03 API