Add /recommend command for profile-based recommendations

[Copilot]

Implements a /recommend slash command that generates personalized recommendations for projects, studios, or users based on Scratch profile analysis.

Implementation

Command signature:

/recommend username:<scratch_username> recommendation_type:<Projects|Users|Studios>

Recommendation algorithms:

• Projects: Analyzes loved projects, recommends other work by those authors
• Users: Collaborative filtering - finds users followed by people you follow
• Studios: Discovers studios sharing curators with user's existing studios

Error handling:

• Validates user existence before analysis
• Handles empty profiles (no loved projects, follows, or studios)
• Gracefully continues on API failures using except Exception

Performance:

• Uses itertools.islice for memory-efficient iteration
• Limits API calls: max 3 loved projects × 5 author projects, 5 followed users × 10 their follows, 5 studios × 10 curators × 5 studios
• Returns top 5 recommendations with metadata (loves, favorites, follower counts)

Added to commands/search_commands.py following existing command patterns.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>/recommend</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

@Fluffyscratch A command to recommend projects, studios, or people based on someone's profile.

• Fixes /recommend #9

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[kRxZykRxZy]

Wow copilot made good code, copilot pro is actually good

[Copilot]

Pull request overview

This PR adds a /recommend slash command that generates personalized recommendations for Scratch projects, users, or studios based on profile analysis. The command uses collaborative filtering techniques to suggest content based on a user's existing preferences.

Changes:

• Implements three recommendation algorithms: projects (via author matching), users (via collaborative filtering), and studios (via curator overlap)
• Adds appropriate error handling for non-existent users and empty profiles
• Uses itertools.islice for memory-efficient iteration over API results

Comments suppressed due to low confidence (1)

commands/search_commands.py:10

• Import of 'requests' is not used.

import requests

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