feat(collections): stabilize interleave

[tomas-zijdemans]

The API was locked in here: #7088 so there should be nothing in the way of stabilization.

Note: zip should be updated to align with interleave

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.61%. Comparing base (a496da2) to head (60e643a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7115   +/-   ##
=======================================
  Coverage   94.61%   94.61%           
=======================================
  Files         634      634           
  Lines       51801    51802    +1     
  Branches     9329     9329           
=======================================
+ Hits        49011    49012    +1     
  Misses       2216     2216           
  Partials      574      574           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[bartlomieju]

The change itself looks correct — rename, export updates, mod.ts re-export, @experimental removal all LGTM.

However, #7088 (which changed the signature from arrays to iterables) was merged just 5 days ago. I'd prefer to let the iterable-based API bake for a couple of weeks before stabilizing, since changing a stable API is much more costly if an issue comes up. Let's revisit this in mid-May.

[lunadogbot]

Matches the established stabilization pattern (e.g. fc259b0 Lazy, 3e91d1e debounce AbortSignal, fe0fb93 ServerSentEventParseStream): rename unstable_interleave.ts → interleave.ts, drop the @experimental tag, swap ./unstable-interleave for ./interleave in collections/deno.json, and re-export from mod.ts. Iterable input was locked in by #7088 (merged 2026-04-21), so the surface is stable. CI green on all matrix jobs.

[lunadogbot]

@bartlomieju this is ready to merge