Add Permalinks to Comments

[devadattas]

Description:

We need to add the functionality of permalinks to comments within the Vikunja application. This will allow users to directly link to specific comments, enhancing the usability and navigation of the comment section.

Acceptance Criteria:

1. Each comment should have a unique permalink.
2. The permalink should be easily accessible from the comment interface (e.g., a link icon next to each comment).
3. Clicking on a permalink should navigate the user directly to the corresponding comment, highlighting it or bringing it into view.
4. Permalinks should be shareable and retain functionality across different devices and sessions.

Technical Notes:

• Ensure the permalink format is consistent with Vikunja's existing URL structure.
• Update the comment component to include the permalink feature.
• Test for cross-browser compatibility and responsiveness.

Additional Information: This feature request stems from user feedback indicating the difficulty in referencing specific comments in long threads. Implementing permalinks will significantly improve the user experience.