feat: remove groups and override feature flags

[peppescg]

Remove feature flags for:

• group catalog
• tools override

---

Note

Removes CUSTOMIZE_TOOLS and GROUPS_IN_REGISTRY feature flags and always enables their UI/behavior; retains only META_OPTIMIZER flag.

• Feature Flags:
  • Remove CUSTOMIZE_TOOLS and GROUPS_IN_REGISTRY from utils/feature-flags and main/src/feature-flags/flags.ts options.
  • Keep only META_OPTIMIZER flag.
• Renderer UI:
  • In server-actions/index.tsx, drop useFeatureFlag usage and always render CustomizeToolsMenuItem.
  • In routes/(registry)/registry.tsx, remove flag gating and always use registry.registry.groups for groups.

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[Copilot]

Pull request overview

This PR removes feature flags for the group catalog and tools override features, enabling them permanently. The changes convert previously gated functionality to be always available.

• Removes CUSTOMIZE_TOOLS and GROUPS_IN_REGISTRY feature flag definitions and configurations
• Unconditionally enables group display in the registry
• Unconditionally shows the "Customize Tools" menu item in server actions

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
utils/feature-flags.ts	Removes CUSTOMIZE_TOOLS and GROUPS_IN_REGISTRY flag key definitions, leaving only META_OPTIMIZER
main/src/feature-flags/flags.ts	Removes feature flag configuration entries for both removed flags
renderer/src/routes/(registry)/registry.tsx	Removes conditional logic for groups display and imports related to the GROUPS_IN_REGISTRY flag
renderer/src/features/mcp-servers/components/card-mcp-server/server-actions/index.tsx	Removes conditional rendering for CustomizeToolsMenuItem and imports related to the CUSTOMIZE_TOOLS flag