feat: add bootstrapFunctions, Svelte support, and fix broken exports

[pierluigilenoci]

Summary

• fix(exports): The exports.".".import field pointed to ./dist/index.js but the build produces ./dist/index.mjs — consumers couldn't import the package
• bootstrapFunctions: Implement the bootstrapFunctions option to sort class strings inside function calls like clsx(), cn(), classNames()
• Svelte support: Add svelte parser that handles both Svelte 4 and Svelte 5 AST structures
• CI improvements: Add format:check step, limit Dependabot to github-actions only, enforce 100% coverage thresholds

Changes

Area	What
package.json	Fix exports path (index.js → index.mjs), add format:check script
src/traversal.ts	sortStringNode helper, processJsxAst CallExpression handling, walkSvelte + processSvelteAst
src/index.ts	Wire bootstrapFunctions option, register svelte parser
.github/dependabot.yml	Remove npm ecosystem (Renovate handles it)
.github/workflows/ci.yml	Add Format check step
vitest.config.ts	Add 100% coverage thresholds
tests/	New snapshot.test.ts, expanded coverage.test.ts and e2e.test.ts
README.md	Document Svelte support and bootstrapFunctions example

Test plan

• pnpm run lint — passes
• pnpm run typecheck — passes
• pnpm run format:check — passes
• pnpm run test:coverage — 88 tests, 100% coverage
• pnpm run build && pnpm publish --dry-run — builds correctly
• node -e "import('prettier-plugin-bootstrap')" — import works after fix

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (e3c2cbf) to head (633f459).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##              main        #9    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files            4         4            
  Lines          426       549   +123     
  Branches        57        82    +25     
==========================================
+ Hits           426       549   +123     

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