feat: add TypeScript types for single-byte.js

[Copilot]

• Create single-byte.d.ts with TypeScript definitions
• Define types for createSinglebyteDecoder function
• Define types for createSinglebyteEncoder function
• Define types for convenience functions (latin1toString, latin1fromString, windows1252toString, windows1252fromString)
• Update package.json exports to include types for single-byte.js
• Address code review feedback on documentation
• Update header comment to match README.md section (main branch)
• Use method documentation from README.md for all functions
• Replace "Will throw" with "Throws" for consistency
• Inline SinglebyteEncoderOptions interface (used only once)
• Document options.mode property using JSDoc @param notation
• Change convenience functions to function declarations instead of const
• Add missing example code block and windows-* encodings note from README
• Rebased on latest main (fb1a7eb - includes bigint types)
• Run security checks (no issues found)
• Final verification complete

Original prompt

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This section details on the original issue you should resolve

<issue_title>Types: single-byte.js</issue_title>
<issue_description>Add types for /single-byte.js</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Types: single-byte.js #22

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[ChALkeR]

@copilot use method docs from README.md

[Copilot]

@copilot use method docs from README.md

Updated in 2625a08. All method documentation now matches the README.md exactly, including:

• Detailed descriptions from README
• Example code blocks showing equivalents
• Additional notes (e.g., TextDecoder aliasing differences for latin1toString)

[Copilot]

Pull request overview

This PR adds comprehensive TypeScript type definitions for the single-byte.js module, enabling better type safety and IDE support for users of this encoding library.

Changes:

• Added complete TypeScript type definitions in single-byte.d.ts with full JSDoc documentation matching the README
• Updated package.json to include the new type definitions in the exports configuration and files array
• Made minor documentation improvements in README.md (reordered sections, changed "Will throw" to "Throws" for consistency)

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
single-byte.d.ts	New TypeScript type definitions file with complete type declarations for all exported functions and interfaces, including detailed JSDoc documentation
package.json	Added single-byte.d.ts to files array and exports configuration to enable TypeScript support
README.md	Minor documentation improvements: reordered section content for better flow and standardized error documentation language

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[ChALkeR]

@copilot rebase on main

[Copilot]

Pull request overview

Copilot reviewed 2 out of 3 changed files in this pull request and generated no new comments.

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