feat(auth): implement user registration and login with JWT authentication

- Added `bcrypt`, `jsonwebtoken`, and `once_cell` dependencies to manage password hashing and JWT handling.
- Created `Claims` struct for JWT claims and implemented token generation in the login route.
- Implemented user registration and authentication logic in the `auth` module.
- Updated error handling to include validation errors.
- Created new routes for user registration and login, and integrated them into the main router.
- Added tests for the authentication flow, including registration and login scenarios.
- Updated user model to include a password hash field.
- Refactored user creation logic to include password validation.
- Adjusted feed and user routes to utilize JWT for authentication.

thoughts-backend/api/src/routers/thought.rs

@@ -21,7 +21,7 @@ use crate::{
 
 #[utoipa::path(
     post,
-    path = "/thoughts",
+    path = "",
     request_body = CreateThoughtParams,
     responses(
         (status = 201, description = "Thought created", body = ThoughtSchema),
@@ -49,7 +49,7 @@ async fn thoughts_post(
 
 #[utoipa::path(
     delete,
-    path = "/thoughts/{id}",
+    path = "/{id}",
     params(
         ("id" = i32, Path, description = "Thought ID")
     ),