chore: Include documentation in index.d.ts

[RunDevelopment]

Fixes mysticatea#19

This PR includes the JSDoc comments for public API parts in index.d.ts. Since dts-bundle doesn't format comments, I used prettier to format index.d.ts, so it's nicer to read.

Note that the other build files (e.g. index.mjs) are not affected by this PR.

Example

// Generated by dts-bundle v0.7.3

declare module "@eslint-community/regexpp" {
  import * as AST from "@eslint-community/regexpp/ast";
  import { RegExpParser } from "@eslint-community/regexpp/parser";
  import { RegExpValidator } from "@eslint-community/regexpp/validator";
  import { RegExpVisitor } from "@eslint-community/regexpp/visitor";
  export { AST, RegExpParser, RegExpValidator };
  /**
   * Parse a given regular expression literal then make AST object.
   * @param source The source code to parse.
   * @param options The options to parse.
   * @returns The AST of the regular expression.
   */
  export function parseRegExpLiteral(
    source: RegExp | string,
    options?: RegExpParser.Options
  ): AST.RegExpLiteral;
  /**
   * Validate a given regular expression literal.
   * @param source The source code to validate.
   * @param options The options to validate.
   */
  export function validateRegExpLiteral(
    source: string,
    options?: RegExpValidator.Options
  ): void;
  export function visitRegExpAST(
    node: AST.Node,
    handlers: RegExpVisitor.Handlers
  ): void;
}

[ota-meshi]

LGTM! Thank you!

[github-actions]

🎉 This PR is included in version 4.5.0 🎉

The release is available on:

• npm package (@latest dist-tag)
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