fix: improve robot permissions checkbox alignment and click targets

[barbierajput378-pixel]

Summary

Robot permissions checkboxes in the robot account creation wizard have
poor visual alignment and small click targets, making them difficult to
interact with on all themes.

Reproduction Steps

1. Navigate to Administration > Robot Accounts > Create Robot
2. Go to Permissions step
3. Observe the checkboxes in the permissions table

Issues Observed

• Checkboxes have insufficient vertical spacing (cells ~24px tall)
• Click target is too small
• Alignment inconsistent with recent checkbox fixes (PR fix: multiple UI/UX fixes for checkboxes, alignment, dark theme, and i18n #23439)

Expected Behavior

• Checkboxes should follow Clarity design system standards
• Click targets should be at least 32px²
• Alignment should match checkbox fixes from PR fix: multiple UI/UX fixes for checkboxes, alignment, dark theme, and i18n #23439

Affected Component

src/app/shared/components/robot-permissions-panel/

Related

Follows pattern from PR #23439 (checkbox alignment fixes)