[BUGFIX] Table: align filter rows with table columns

[Aln999]

Description

This PR fixes the filter row alignment issue when the table is scrolled horizontally. It keeps the filter row aligned with the table columns, ensures the filter widths stay in sync, and fixes the filter search so it matches the displayed values correctly

Changes

• Added a filter row above the table to filter data column by column.
• Kept the filter row aligned with the table while scrolling horizontally.
• Fixed filter column widths so they always match the table columns.
• Improved filter dropdown positioning so it opens correctly without getting cut off.
• Made the filter dropdown close when the same filter button is clicked again.
• Fixed search inside the filter dropdown to search the displayed values correctly.
• Updated the tests and added the required setup for the new filter row functionality.

Screenshots

Screen.Recording.2026-07-26.230445.mp4

Checklist

• Pull request has a descriptive title and context useful to a reviewer.
• Pull request title follows the [<catalog_entry>] <commit message> naming convention using one of the
  following catalog_entry values: FEATURE, ENHANCEMENT, BUGFIX, BREAKINGCHANGE, DOC,IGNORE.
• All commits have DCO signoffs.

UI Changes

• Changes that impact the UI include screenshots and/or screencasts of the relevant changes.
• Code follows the UI guidelines.

#Relates to perses/perses#3835

[shahrokni]

@Aln999
You also need to rebase main

This branch is out-of-date with the base branch
Merge the latest changes from main into this branch

Please let me know if you need help for that

[shahrokni]

@Aln999
You have failing pipelines. Please take a look and resolve the issues. The issues are tiny.
Since, the pipeline is not automatically running automatically after every push, you can check the linters, tests, etc locally to make sure that everything is in order before pushing to the remote side.

[shahrokni]

@Aln999
There is an old bug here and I am wondering, if this is the best time to get rid of it! However, if it only takes less than an hour!
So, feel free to ignore this one, if it demands some times and effort.
You see the filter button here? The click wouldn't close the filter. Could we fix this?

[shahrokni]

I tested the table PR and your fix amazingly have made it way better! I really appreciate for the contribution. I tried to be picky and find something to complain about but I couldn't! Thank you @Aln999 🚀