refactor: improve TypeScript build configuration

[cyjake]

• Consolidate tsconfig files into single tsconfig.json
• Move entry point to src/index.ts for cleaner build output
• Configure Mocha to run TypeScript tests directly via ts-node
• Update build to output to dist/ directory without nested src/
• Remove pretest compilation step (tests run directly from TS)
• Add .mocharc.json for Mocha configuration

This prepares the codebase for JSR publishing support while maintaining backward compatibility with npm.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.05%. Comparing base (f0c264b) to head (e0c3a94).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #96   +/-   ##
=======================================
  Coverage   97.05%   97.05%           
=======================================
  Files           3        3           
  Lines         339      340    +1     
  Branches       93       93           
=======================================
+ Hits          329      330    +1     
  Misses          4        4           
  Partials        6        6           

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[Copilot]

Pull Request Overview

This PR refactors the TypeScript build configuration to prepare the codebase for JSR publishing while maintaining npm compatibility. The changes consolidate configuration files, improve the build output structure, and enable running tests directly from TypeScript source files.

• Consolidates TypeScript configuration into a single tsconfig.json with proper rootDir and outDir settings
• Moves the package entry point from root index.ts to src/index.ts for cleaner build output to dist/ directory
• Configures Mocha to run TypeScript tests directly via ts-node, eliminating the need for pretest compilation

Reviewed Changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tsconfig.json	Added rootDir, outDir, declarationDir options and explicit include/exclude patterns to compile only source files to dist/
package.json	Updated entry points to dist/index.js and dist/index.d.ts, added ts-node dependency, and modified scripts to run tests directly from TypeScript
.mocharc.json	Added Mocha configuration to run TypeScript tests directly via ts-node/register
test/unit/glob.test.ts	Updated import path from '../../src/glob' to '../..' to import from the package root
src/index.ts	New entry point that imports and re-exports all exports from ssh-config.ts
src/ssh-config.ts	Added named export for glob function to make it available through the package's public API
index.ts	Removed root-level entry point (moved to src/index.ts)

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