feat(custom-columns): add guard popup for custom columns

[HamedMP]

Problem

the column customization is ee only feature, causing this for non-ee (self-hosted) users.

Changes

add a popup guard similar to color customization (but currently doesn't work for my local customer)

how it will look in future (for color one as example):

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Does this work well for both Cloud and self-hosted?

How did you test this code?

[greptile-apps]

PR Summary

Added guard popup functionality for column customization as an Enterprise Edition feature, restricting access for non-EE users with an upgrade modal.

• Added CUSTOMIZE_COLUMNS to AvailableFeature enum in types.ts to mark feature as enterprise-only
• Integrated upgradeModalLogic and guardAvailableFeature in ColumnConfigurator.tsx to handle access control
• Added restriction check when saving custom columns as default with toggleSaveAsDefault
• Implemented similar UX pattern as existing color customization feature for consistency

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[greptile-apps]

logic: The guard is only applied to saving default columns, but not to the initial column customization. Consider guarding the showModal action as well.

[github-actions]

Size Change: +10 B (0%)

Total Size: 9.75 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	9.75 MB	+10 B (0%)

_{compressed-size-action}

[posthog-bot]

This PR hasn't seen activity in a week! Should it be merged, closed, or further worked on? If you want to keep it open, post a comment or remove the stale label – otherwise this will be closed in another week. If you want to permanentely keep it open, use the waiting label.

[posthog-bot]

This PR was closed due to lack of activity. Feel free to reopen if it's still relevant.