fix(hang): remove public SCTE-35 schema

[arielmol]

Summary

Tiny follow-up to #1658, as discussed with @kixelated:

• remove the accidentally public SCTE-35 schema and types from @moq/hang
• remove its dedicated tests and the now-unused @moq/json dev dependency
• keep application extensions defined privately by their applications

The generic extension tests stay. #1617 will define the actual SCTE-35 section.

Test plan

• bun test js/hang — 25 pass / 0 fail
• bun run --cwd js/hang check (tsc) — clean
• bunx biome check js/hang — clean
• tsc on dependents js/publish / js/watch — clean

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 5cbd48f8-47c5-42b2-bb7d-4956ddab8fa1

📥 Commits

Reviewing files that changed from the base of the PR and between 9962c30 and 47a643a.

⛔ Files ignored due to path filters (1)

• bun.lock is excluded by !**/*.lock

📒 Files selected for processing (4)

• js/hang/package.json
• js/hang/src/catalog/index.ts
• js/hang/src/catalog/scte35.test.ts
• js/hang/src/catalog/scte35.ts

💤 Files with no reviewable changes (4)

• js/hang/src/catalog/scte35.ts
• js/hang/src/catalog/scte35.test.ts
• js/hang/src/catalog/index.ts
• js/hang/package.json

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Walkthrough

This PR removes the scte35 catalog module from the js/hang package. The wildcard re-export of ./scte35 is deleted from the catalog barrel export in index.ts, making the module no longer part of the public API. The @moq/json workspace dependency is removed from package.json. The corresponding implementation file, tests, and schemas are also deleted but do not impact the public interface.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'fix(hang): remove public SCTE-35 schema' clearly and concisely summarizes the main change: removing accidentally public SCTE-35 exports from the @moq/hang package.
Description check	✅ Passed	The description directly relates to the changeset, explaining the rationale for removing public SCTE-35 schema/types, removing tests, and removing the unused @moq/json dependency, with a clear test plan demonstrating validation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code

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