[rishilifts]

Fixes #744.

What: Give the ./matchers import condition an ESM declaration file with named exports. Keep the existing CommonJS declaration for the require condition.

Why: A dynamic import currently has a phantom default in its type, although the ESM module only exports named matchers. This makes Bun's expect.extend(await import(...)) fail type-checking.

How: Reuse the standalone matcher signatures in a .d.mts declaration. Added Bundler and Node16 type fixtures for static and dynamic imports, absence of default, the complete matcher key set, the exported interface and both toHaveClass overloads.

Validation:

• Both new configurations fail with the original import declaration and pass with the fix.
• All existing Jest, Jest globals, Vitest and Bun type tests pass.
• 632 tests / 64 suites and 118 unchanged snapshots pass; coverage is 100%.
• Full lint, formatting and build pass.
• Built ESM module's 49 runtime names match the declaration names; npm pack includes the new declaration.

The test run needs FORCE_COLOR=1 in this environment because diagnostic snapshots contain ANSI colors. Without it, the same 100 snapshot mismatches occur on the unchanged baseline; no snapshots were updated.

Checklist:

• Tests
• Updated Type Definitions
• Ready to be merged after review
• Documentation: N/A, no API change