updates tag model, adds PersonCredential model

MODELS.md

@@ -32,19 +32,56 @@ struct Person {
 }
 ```
 
+# PersonCredential
+
+A PersonCredential is an authentication method associated with a specific Person.
+
+``` rust
+struct PersonCredentialId {
+    id: String,
+}
+enum PersonCredentialProviderType {
+    OAuth2,
+    Local,
+}
+struct PersonCredentialProviderId {
+    id: String,
+}
+enum PersonCredentialProvider {
+    id: PersonCredentialProviderId,
+    name: String,
+    config: String,
+}
+struct PersonCredential {
+    id: PersonCredentialId,
+    person_id: PersonId,
+    provider_id: PersonCredentialProviderId,
+    provider_user_id: String,
+    is_enabled: bool,
+}
+```
+
 # Tag
 
 A Tag is a classification label that a Person wants to associate to a Label, an Artist, an Album, a Track, or a Playlist, used as a way of grouping entities together via some commonality the context of which is not programmatically relevant.
 
 ``` rust
-struct TagId {
-    host: String,
-    id: String,
-}
 struct Tag {
-    id: TagId,
+    host: String,
     name: String,
 }
+impl Tag {
+    pub fn new(host: String, name: String) -> Self {
+        TagId {
+            host,
+            name,
+        }
+    }
+
+    pub fn to_string(&self) -> String {
+        format!("Tag({}::tag::{})", &self.host, &self.name)
+    }
+}
 ```
 
 # Label
@@ -191,6 +228,7 @@ struct Article {
     modified_at: chrono::DateTime,
     deleted_at: Option<chrono::DateTime>
     is_public: bool,
+    is_draft: bool,
     cover: Option<String>,
     images: Option<Vec<String>>,
     tracks: Option<Vec<Track>>,
@@ -210,6 +248,7 @@ enum CommentTargetType {
     Album,
     Track,
     Playlist,
+    Article,
     Comment,
 }
 struct CommentTargetId {
@@ -218,6 +257,7 @@ struct CommentTargetId {
     album_id: Option<AlbumId>,
     track_id: Option<TrackId>,
     playlist_id: Option<PlaylistId>,
+    article_id: Option<ArticleId>,
     comment_id: Option<CommentId>,
 }
 struct CommentId {
@@ -233,6 +273,8 @@ struct Comment {
     modified_at: chrono::DateTime,
     deleted_at: Option<chrono::DateTime>
     is_public: bool,
+    is_approved: bool,
+    in_reply_to: Option<CommentId>,
 }
 ```