refactor!: migrate away from bun

- migrate package management to pnpm
- migrate test suite to vitest
- also remove Anify integration

src/libs/lazy.spec.ts

@@ -1,4 +1,4 @@
-import { describe, expect, it } from "bun:test";
+import { describe, expect, it } from "vitest";
 
 import { lazy } from "./lazy";
 
@@ -16,7 +16,7 @@ describe("lazy", () => {
       return "value";
     });
 
-    expect(setValue).toBeFalse();
+    expect(setValue).toBe(false);
   });
 
   it("lazy function called if get is called", () => {
@@ -26,7 +26,7 @@ describe("lazy", () => {
       return "value";
     }).get();
 
-    expect(setValue).toBeTrue();
+    expect(setValue).toBe(true);
   });
 
   it("lazy function called only once if get is called multiple times", () => {