fix(typescript): set rootDir for TS 6.0 build partials

[jhnns]

Summary

• Set rootDir to ${configDir}/src in typescript/lib and typescript/js-lib build partials so emit output stays flat in dist/ under TypeScript 6.0
• Override rootDir to . in this repo's root tsconfig.json for its flat source layout
• Document the default and override guidance in typescript/README.md

Test plan

• tsc --noEmit passes locally
• tsc build emits declarations to dist/ only (no source-tree .d.ts pollution)
• CI passes on PR

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@peerigon/configs@226

commit: c6c54b8

[Copilot]

Pull request overview

Adjusts the published TypeScript build partials to behave correctly under TypeScript 6.0, keeping emitted outputs stable (flat under dist/) while documenting how consumers can override defaults for non-src/ layouts.

Changes:

• Set compilerOptions.rootDir to ${configDir}/src in typescript/lib.json and typescript/js-lib.json to prevent dist/src/... output under TS 6.0.
• Override rootDir to . in the repo’s root tsconfig.json to support this repo’s non-src/ source layout.
• Document the new default + override guidance in typescript/README.md.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 1 comment.

File	Description
typescript/README.md	Documents the new rootDir default and when to override it.
typescript/lib.json	Sets rootDir so TS library builds emit flat into dist/.
typescript/js-lib.json	Sets rootDir so JS+JSDoc library builds emit flat into dist/.
tsconfig.json	Overrides rootDir for this repo’s multi-folder source layout.

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