refactor(models): update data models and remove deprecated IM entities

- Update channel, notification, PR, repo, user, workspace models
- Remove deleted IM models: articles, channel follows, message
  attachments/bookmarks/drafts/edit history/embeds/mentions/pins/
  polls/reactions/threads, saved messages, thread read states
- Add new PR models: review requests, templates
- Add repo release assets model
- Add base_info module for API detail responses

models/prs/mod.rs

@@ -9,8 +9,10 @@ pub mod pr_merge_strategy;
 pub mod pr_reactions;
 pub mod pr_review;
 pub mod pr_review_comment;
+pub mod pr_review_requests;
 pub mod pr_status;
 pub mod pr_subscriptions;
+pub mod pr_templates;
 pub mod pull_request;
 pub mod pull_request_queries;
 
@@ -23,8 +25,10 @@ pub use pr_label_relations::PrLabelRelation;
 pub use pr_labels::PrLabel;
 pub use pr_merge_strategy::PrMergeStrategy;
 pub use pr_reactions::PrReaction;
-pub use pr_review::PrReview;
+pub use pr_review::{PrReview, PrReviewDetail};
 pub use pr_review_comment::PrReviewComment;
+pub use pr_review_requests::PrReviewRequest;
 pub use pr_status::PrStatus;
 pub use pr_subscriptions::PrSubscription;
-pub use pull_request::PullRequest;
+pub use pr_templates::PrTemplate;
+pub use pull_request::{PullRequest, PullRequestDetail};