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/Cargo.lock

@@ -127,8 +127,11 @@ dependencies = [
  "anyhow",
  "app",
  "axum",
+ "bcrypt",
  "dotenvy",
+ "jsonwebtoken",
  "models",
+ "once_cell",
  "sea-orm",
  "serde",
  "tower",
@@ -143,8 +146,10 @@ dependencies = [
 name = "app"
 version = "0.1.0"
 dependencies = [
+ "bcrypt",
  "models",
  "sea-orm",
+ "validator",
 ]
 
 [[package]]
@@ -435,6 +440,19 @@ version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55248b47b0caf0546f7988906588779981c43bb1bc9d0c44087278f80cdb44ba"
 
+[[package]]
+name = "bcrypt"
+version = "0.17.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abaf6da45c74385272ddf00e1ac074c7d8a6c1a1dda376902bd6a427522a8b2c"
+dependencies = [
+ "base64",
+ "blowfish",
+ "getrandom 0.3.3",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "bigdecimal"
 version = "0.4.8"
@@ -492,6 +510,16 @@ dependencies = [
  "piper",
 ]
 
+[[package]]
+name = "blowfish"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e412e2cd0f2b2d93e02543ceae7917b3c70331573df19ee046bcbc35e45e87d7"
+dependencies = [
+ "byteorder",
+ "cipher",
+]
+
 [[package]]
 name = "borsh"
 version = "1.5.7"
@@ -591,6 +619,16 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "cipher"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
+dependencies = [
+ "crypto-common",
+ "inout",
+]
+
 [[package]]
 name = "clap"
 version = "4.5.40"
@@ -1605,6 +1643,15 @@ dependencies = [
  "syn 2.0.104",
 ]
 
+[[package]]
+name = "inout"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "879f10e63c20629ecabbb64a8010319738c66a5cd0c29b02d63d272b03751d01"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "ipnet"
 version = "2.11.0"
@@ -1643,6 +1690,21 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "jsonwebtoken"
+version = "9.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a87cc7a48537badeae96744432de36f4be2b4a34a05a5ef32e9dd8a1c169dde"
+dependencies = [
+ "base64",
+ "js-sys",
+ "pem",
+ "ring",
+ "serde",
+ "serde_json",
+ "simple_asn1",
+]
+
 [[package]]
 name = "kv-log-macro"
 version = "1.0.7"
@@ -1992,6 +2054,16 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
+[[package]]
+name = "pem"
+version = "3.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38af38e8470ac9dee3ce1bae1af9c1671fffc44ddfd8bd1d0a3445bf349a8ef3"
+dependencies = [
+ "base64",
+ "serde",
+]
+
 [[package]]
 name = "pem-rfc7468"
 version = "0.7.0"
@@ -3117,6 +3189,18 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3a9fe34e3e7a50316060351f37187a3f546bce95496156754b601a5fa71b76e"
 
+[[package]]
+name = "simple_asn1"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "297f631f50729c8c99b84667867963997ec0b50f32b2a7dbcab828ef0541e8bb"
+dependencies = [
+ "num-bigint",
+ "num-traits",
+ "thiserror 2.0.12",
+ "time",
+]
+
 [[package]]
 name = "siphasher"
 version = "1.0.1"