feat: add types for encoding-lite.js

[ChALkeR]

See #12

[Copilot]

Pull request overview

This PR adds TypeScript type definitions for the encoding-lite.js module, which provides a lighter-weight version of the encoding module without multi-byte decoder support loaded by default.

• Added encoding-lite.d.ts type definition file that re-exports types from encoding module
• Updated package.json to include the new type definition file in the package and export configuration

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
encoding-lite.d.ts	New TypeScript type definition file that re-exports all types from the encoding module
package.json	Added encoding-lite.d.ts to the files array and updated the exports map to include types resolution for encoding-lite.js

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