Refactor blog module and remove blog-related functionality

- Removed blog router and associated API endpoints.
- Deleted blog persistence functions and related query parameters.
- Removed blog schemas and models from the codebase.
- Introduced common crate for shared types, including DateTimeWithTimeZoneWrapper.
- Added Thought and Follow models with corresponding migrations.
- Updated dependencies in Cargo.toml files to reflect changes.
- Adjusted tests to remove references to the blog module.

thoughts-backend/models/src/domains/user.rs

@@ -12,15 +12,6 @@ pub struct Model {
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
-pub enum Relation {
-    #[sea_orm(has_many = "super::blog::Entity")]
-    Blog,
-}
-
-impl Related<super::blog::Entity> for Entity {
-    fn to() -> RelationDef {
-        Relation::Blog.def()
-    }
-}
+pub enum Relation {}
 
 impl ActiveModelBehavior for ActiveModel {}