feat(markdown): add formatting & improve inline support (#1804)

feat(markdown): support formatting & hyperlinks

Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>

tests/data/groundtruth/docling_v2/inline_and_formatting.md.md

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+# Contribution guideline example
+
+This is simple.
+
+Foo *emphasis* **strong emphasis** ***both*** .
+
+Create your feature branch: `git checkout -b feature/AmazingFeature` .
+
+1. Pull the [**repository**](https://github.com/docling-project/docling) .
+2. Create your feature branch ( `git checkout -b feature/AmazingFeature` )
+3. Commit your changes ( `git commit -m 'Add some AmazingFeature'` )
+4. Push to the branch ( `git push origin feature/AmazingFeature` )
+5. Open a Pull Request
+
+## 
+
+*Second* section
+
+- **First** : Lorem ipsum.
+- **Second** : Dolor `sit` amet.