feat: initialize FewLineSDK project with TypeScript setup

- Add package.json with dependencies and scripts for building and linting
- Create initial FewLineSDK class in src/index.ts
- Set up TypeScript configuration in tsconfig.json

src/index.ts

@@ -0,0 +1,7 @@
+export class FewLineSDK {
+    constructor(private url: string, private token: string) {}
+
+    public getUrl(): string {
+        return this.url;
+    }
+}