feat(docx): add text formatting and hyperlink support (#630)

* feat: Enable markdown text formatting for docx

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Fix imports

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Use Formatting

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Handle hyperlink

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Handle formatting properly for DocItemLabel.PARAGRAPH

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Use inline group

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Handle bullet lists

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Strip elements

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Strip elements

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Run black and mypy

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Handle header and footer

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Use inline_fmt everywhere

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Run precommit

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Address feedback

Signed-off-by: SimJeg <sjegou@nvidia.com>

* Fix add_list_item

Signed-off-by: SimJeg <sjegou@nvidia.com>

* fix minor bugs, mark helper methods internal

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

---------

Signed-off-by: SimJeg <sjegou@nvidia.com>
Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>
Co-authored-by: Panos Vagenas <pva@zurich.ibm.com>

tests/data/groundtruth/docling_v2/unit_test_formatting.docx.md

@@ -0,0 +1,17 @@
+*italic*
+
+**bold**
+
+underline
+
+[hyperlink](https:/github.com/DS4SD/docling)
+
+[***italic and bold hyperlink***](https:/github.com/DS4SD/docling)
+
+Normal *italic* **bold** underline and [hyperlink](https:/github.com/DS4SD/docling) on the same line
+
+- *Italic bullet 1*
+- **Bold bullet 2**
+- Underline bullet 3
+- Some *italic* **bold** underline
+    - Nested *italic* **bold**