RI-8160: enable column resizing

[dantovska]

What

Enable column resizing for Element List table and Similarity Search table (plus adjust current column size).
Note: this will be visible in the PR with more columns present.

Testing

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Note

Low Risk
Low risk UI-only change that adjusts table layout/interaction without touching data fetching or persistence; main risk is minor layout regression in these views.

Overview
Enables column resizing for the Vector Set Element List and Similarity Search Results tables via the enableColumnResizing table option.

Adjusts default column sizing to better fit resizable layouts (e.g., Name column width reduced) and explicitly disables resizing on narrow utility columns like Actions and Similarity (setting them to fixed small widths).

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[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}

[github-actions]

Code Coverage - Frontend unit tests

St.❔	Category	Percentage	Covered / Total
🟢	Statements	82.74%	24446/29547
🟡	Branches	67.94%	10266/15110
🟡	Functions	77.89%	6599/8472
🟢	Lines	83.2%	23884/28706

Test suite run success

6867 tests passing in 793 suites.

Report generated by 🧪jest coverage report action from 8bf0aee

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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The base branch was changed.