Fix package types entry

[luuhongyii]

Summary

• point the top-level types field to the generated declaration file at dist/index.d.ts
• leave the existing exports and typesVersions mappings aligned with the same declaration entry

Problem

@rpf3/spek@0.95.0 publishes dist/index.d.ts, but the package manifest currently advertises:

"types": "index.d.ts"

The published package tarball does not include a root index.d.ts, so tools that read the package-level types field can resolve to a missing declaration file even though the correct declaration file is already present under dist/.

Verification

• npm view @rpf3/spek@0.95.0 name version types exports --json
• npm pack @rpf3/spek@0.95.0 --dry-run --ignore-scripts --json confirms root index.d.ts is absent and dist/index.d.ts is present
• corepack pnpm@8.15.9 install --frozen-lockfile --ignore-scripts
• corepack pnpm@8.15.9 exec svelte-kit sync
• corepack pnpm@8.15.9 run package
• corepack pnpm@8.15.9 run check passes with 0 errors and 4 existing accessibility warnings
• local npm pack --dry-run --ignore-scripts --json after package generation confirms the configured types file exists in the packed file list
• git diff --check

Note

corepack pnpm@8.15.9 test -- --reporter=list currently exits with No tests found; I left that unrelated test-suite setup issue out of this focused manifest fix.