Studio Blueprints Gallery: Hide incompatible blueprints

[katinthehatsite]

Related issues

Fixes STU-1709

How AI was used in this PR

It was not necessary, the fix is straightforward

Proposed Changes

This PR hides some incompatible blueprints that come from the public blueprints library and that don't work well with Studio e.g Coffee Shop.

Testing Instructions

• Pull the changes from this branch
• Start Studio with npm start
• Enable the Enable Blueprints Gallery feature flag on the top
• Click on Add site > Build a new site
• Scroll down to the blueprints library
• Confirm that you can't see, for example, Coffee Shop blueprints

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[wpmobilebot]

📊 Performance Test Results

Comparing 412bb74 vs trunk

app-size

Metric	trunk	412bb74	Diff	Change
App Size (Mac)	1410.41 MB	1410.41 MB	+0.00 MB	⚪ 0.0%

site-editor

Metric	trunk	412bb74	Diff	Change
load	1518 ms	1511 ms	7 ms	⚪ 0.0%

site-startup

Metric	trunk	412bb74	Diff	Change
siteCreation	8120 ms	8084 ms	36 ms	⚪ 0.0%
siteStartup	4927 ms	4946 ms	+19 ms	⚪ 0.0%

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Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)