chore: suppress existing type errors so lint:tsc can run in CI

[cryptodev-2s]

Explanation

lint:tsc typechecks every package, but the repo currently has 1,591 type errors, nearly all of them in test files. That makes it impossible to enforce typechecking in CI without fixing everything first.

This adds tsc-suppressions.json, which records how many errors of each code every file currently produces, in the same shape as eslint-suppressions.json.

• yarn lint:tsc:check typechecks the repo and fails when a file produces an error the suppressions don't cover, or when a suppression no longer covers anything.
• yarn lint:tsc:suppress regenerates the file.

Existing errors stay parked so they can be worked through package by package, while packages that are already clean can't regress. A cold run takes about 12 seconds, so the check is wired back into CI and into yarn lint.

Error messages are deliberately left out of the suppression key. Their wording changes between TypeScript releases, which would invalidate the whole file at once.

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

---

Note

Low Risk
Changes are CI/tooling and a checked-in suppressions baseline; runtime package behavior is unchanged, though contributors may need yarn lint:tsc:suppress when fixing types.

Overview
Adds a suppression-based TypeScript lint gate so the monorepo can run full tsc --build tsconfig.lint.json in CI without fixing ~1,591 existing errors first.

tsc-suppressions.json records allowed error counts per file and TS code (same idea as eslint-suppressions.json, without message text). yarn lint:tsc:check runs the build, parses output, and fails on new unsuppressed errors or stale suppressions; yarn lint:tsc:suppress regenerates the file. Supporting logic lives under scripts/lib/ with Jest coverage.

yarn lint and the lint CI matrix now include lint:tsc:check. tsconfig.packages.lint.json sets rootDir: "." so lint declaration emit does not spill into the repo root when tests import cross-package helpers.

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[cryptodev-2s]

@mcmire I am still reviewing this however does the idea sounds to you ?

[mcmire]

@cryptodev-2s Yeah if you can get this working this would be great!

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