feat(auth): Enhance Google OAuth service with CSRF protection and validation logic

feat(auth): Add error handling for authentication and validation errors
feat(auth): Implement default role assignment for new users in Google OAuth flow
feat(utils): Introduce CSRF token generation and validation utilities
fix(dependencies): Update Cargo.toml to include base64 and sha2 dependencies

imphnen-utils/src/lib.rs

@@ -10,6 +10,7 @@ pub mod query_list;
 pub mod response_format;
 pub mod serde_helpers;
 pub mod validator;
+pub mod csrf_token;
 
 pub use logger::init_logger;
 pub use bind_filter::*;
@@ -28,3 +29,4 @@ pub use serde_helpers::{
 	string_or_empty_string, thing_or_string,
 };
 pub use validator::*;
+pub use csrf_token::*;