Feat: Add low level comments and comment replies support

[bhavasagar-dv]

Feature: Enhanced Word Document Comments and comment replies Support

This pull request adds comprehensive support for comments and comment replies in Word documents, introducing new capabilities for handling comment metadata and references.

New Capabilities:

1. Add comments to paragraphs.
2. Creating threads with the existing comments.
3. Spaning comments across multiple paragraphs.

Example Usage:

from docx import Document

document = Document("sample.docx")
p = document.add_paragraph("This is an example paragraph")
parent_comment = p.add_comment(
    "Testing Comment",
    author="Test Author",
    initials="TA",
    date="2025-01-01 00:00:00",
    resolved=True,
)
p.add_comment(
    "Testing Comment Reply 1",
    author="Test Author",
    initials="TA",
    date="2025-01-01 00:00:00",
    resolved=True,
    parent=parent_comment,
)
p.add_comment(
    "Testing Comment Reply 2",
    author="Test Author",
    initials="TA",
    date="2025-01-01 00:00:00",
    resolved=True,
    parent=parent_comment,
)
document.save("add_comments.docx")

To mark a comment over multiple paragraphs or just a single run

from docx import Document

document = Document("sample.docx")
para = document.add_paragraph()
comment = para.mark_comment_start("testing comment", "Test Author", "TA", "2025-01-01 00:00:00")
comment2 = para.mark_comment_start(
    "testing comment reply", "Test Author", "TA", "2025-01-01 00:00:00", parent=comment
)

para.add_run("Some random text")

para2 = document.add_paragraph("Another para")
para2.mark_comment_end(comment.id)
para2.mark_comment_end(comment2.id)
para2.add_run("Lorem ipsum dolor sit amet")

document.save("add_comments.docx")

Another similar PR #624 but it doesn't address the comment replies. So, I have created this PR.

[bhavasagar-dv]

@scanny can you please look into this, and if any changes are required please let us know, we are happy to contribute to this feature. Thanks.

[rdaim]

thanks,can you add a comment to a run? like this:

run = paragraph2.add_run('text1') #add a run to the paragraph

run.add_comment('comment') # add a comment only for the run text

run.add_comment('comment2')

run_comments = run.comments

[bhavasagar-dv]

@rdaim we can add a comment for a run like this.

from docx import Document

document = Document("sample.docx")

para = document.add_paragraph()
comment = para.mark_comment_start("testing comment", "Test Author", "TA", "2025-01-01 00:00:00")
para.add_run("Some random text with a comment. ")
para.mark_comment_end(comment.id)
para.add_run("This text doesn't have a comment")

document.save("add_comments.docx")

[rdaim]

@rdaim we can add a comment for a run like this.

from docx import Document

document = Document("sample.docx")

para = document.add_paragraph()
comment = para.mark_comment_start("testing comment", "Test Author", "TA", "2025-01-01 00:00:00")
para.add_run("Some random text with a comment. ")
para.mark_comment_end(comment.id)
para.add_run("This text doesn't have a comment")

document.save("add_comments.docx")

wowww, thanks a lot!