Tatsh / jxa-lib-examples / 25449493360

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tests: switch from Jest to Vitest, unpin TypeScript, fix CI

Replace the Jest stack (`jest`, `ts-jest`, `@types/jest`) with `vitest`
and `@vitest/coverage-v8`. Test files now import from `vitest`. Class
mocks use a `function (this: ...)` form so Vitest 4's stricter
constructor handling (`mockReturnValue` is rejected when the mock is
called with `new`) can resolve them. The `main.test.ts` global stub
setup is wrapped in `vi.hoisted(...)` so the real `jxa-lib` module can
be loaded for auto-mock introspection without tripping its top-level
`ObjC.import` calls. The `ramda/es/path` mock factory now returns
`{ default: vi.fn() }` to satisfy Vitest's default-import contract.

Drop the temporary TypeScript 5.x pin from `.wiswa.jsonnet` and the
`moduleResolution: node` override in `tsconfig`. The `Tests` workflow
runs `yarn vitest run --coverage`.

Signed-off-by: Andrew Udvare <audvare@gmail.com>

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