refactor: rewrite js sdk (#48)

* refactor: rewrite js sdk

* feat: integrate comprehensive JS SDK rewrite

Merge includes a complete overhaul of the JavaScript SDK, introducing full type-safety, tree-shakeable modules, and deprecated legacy SDK classes and methods.

BREAKING CHANGE: The SDK rewrite introduces breaking changes to the public API. Users are recommended to migrate to the new API functions.

Resolves: #35, #29, #28, #25, #22, #19

* chore: add pre-commit and commit-msg git hooks

---------

Co-authored-by: Branko Conjic <brankoconjic@gmail.com>

Author: keyding

.changeset/config.json

@@ -1,11 +1,11 @@
 {
-  "$schema": "https://unpkg.com/@changesets/config@3.0.0/schema.json",
-  "changelog": ["@changesets/changelog-github", { "repo": "lmsqueezy/lemonsqueezy.js" }],
-  "commit": false,
-  "fixed": [],
-  "linked": [],
-  "access": "public",
-  "baseBranch": "main",
-  "updateInternalDependencies": "patch",
-  "ignore": []
+	"$schema": "https://unpkg.com/@changesets/config@3.0.0/schema.json",
+	"changelog": ["@changesets/changelog-github", { "repo": "lmsqueezy/lemonsqueezy.js" }],
+	"commit": false,
+	"fixed": [],
+	"linked": [],
+	"access": "public",
+	"baseBranch": "main",
+	"updateInternalDependencies": "patch",
+	"ignore": []
 }

.changeset/modern-laws-hang.md

@@ -0,0 +1,52 @@
+---
+"@lemonsqueezy/lemonsqueezy.js": major
+---
+
+BREAKING CHANGE: Completely rewritten the JS SDK for full type-safety and tree-shakeability.
+
+## Notes:
+
+- **Bun**: Transitioned to Bun for repo management.
+
+- **Type-safe**: Written in TypeScript and documented with TSDoc.
+
+- **Tree-shakeable**: Use only functions that you need.
+
+- **Improved docs**: Added detailed Wiki pages on how to use the new SDK functions.
+
+- **Deprecate old SDK classes and methods**: The deprecated methods and the LemonSqueezy class will be removed with the next major release.
+
+- **Unit tests**: Introduces comprehensive unit tests for all functions.
+
+- **Improved repo management**: Transitioned to Bun, adopted Conventional Commits convention, husky, Prettier, ESLint and other tools for better repo management.
+
+## Fixes:
+
+This release fixes the following issues.
+
+- #35
+- #29
+- #28
+- #25
+- #22
+- #19
+
+## How to upgrade
+
+Use the new setup function to initialize the SDK with your API key.
+
+```tsx
+lemonSqueezySetup({ apiKey });
+```
+
+Import functions from the SDK and use them in your application.
+
+```tsx
+const { data, error, statusCode } = await getAuthenticatedUser();
+```
+
+For more information, see [API Reference](https://docs.lemonsqueezy.com/api) and [Functions Usage Wiki](https://github.com/lmsqueezy/lemonsqueezy.js/wiki).
+
+## Credits
+
+🎉 A massive thanks to @heybrostudio for their awesome work and contributions that led to this release.