fix: fix duplicate title and heading + add e2e tests for html and docx (#186)

* add real e2e tests for html and docx

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* updated the output of itxt

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* reformatted the text

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* fixed the tests

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* fixed the tests (2)

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* fixed the examples (1)

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* fixed the output of the test

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* updated the tests, moved the ground-truth

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* moved the ground-truth data

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* fixed the html tests

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* restructure title fix (#187)

Signed-off-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>

---------

Signed-off-by: Peter Staar <taa@zurich.ibm.com>
Signed-off-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>
Co-authored-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>

tests/data/groundtruth/docling_v2/example_03.html.md

@@ -0,0 +1,27 @@
+# Example Document
+
+## Introduction
+
+This is the first paragraph of the introduction.
+
+## Background
+
+Some background information here.
+
+- First item in unordered list
+    - Nested item 1
+    - Nested item 2
+- Second item in unordered list
+
+1 First item in ordered list
+    1. Nested ordered item 1
+    2. Nested ordered item 2
+2. Second item in ordered list
+
+## Data Table
+
+| Header 1     | Header 2     | Header 3     |
+|--------------|--------------|--------------|
+| Row 1, Col 1 | Row 1, Col 2 | Row 1, Col 3 |
+| Row 2, Col 1 | Row 2, Col 2 | Row 2, Col 3 |
+| Row 3, Col 1 | Row 3, Col 2 | Row 3, Col 3 |