Closes #5154

Release Notes:

- Added a setting (`completion_detail_alignment`) to change the detail
text alignment in code completion context menus.

<table>
<tr>
 <td>Right Alignment
 <td>Left Alignment
<tr>
 <td>
<img width="802" height="427" alt="image"
src="https://github.com/user-attachments/assets/46202f3d-32cc-4431-aebd-aa3c52d84993"
/>
 <td>
<img width="783" height="427" alt="image"
src="https://github.com/user-attachments/assets/d26559d2-c433-4bf7-a302-e683bd5fa9f7"
/>
</table>

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Co-authored-by: Danilo Leal <daniloleal09@gmail.com>