feat(lexica): getPostThreadV2 lexicon

lexica/src/app_bsky/mod.rs

···
 pub mod graph;
 pub mod labeler;
 pub mod richtext;
+pub mod unspecced;
 
 #[derive(Clone, Default, Debug, Serialize)]
 #[serde(rename_all = "camelCase")]

lexica/src/app_bsky/unspecced.rs

···
+use crate::app_bsky::feed::{BlockedAuthor, PostView};
+use serde::Serialize;
+
+#[derive(Clone, Debug, Serialize)]
+pub struct ThreadV2Item {
+    pub uri: String,
+    pub depth: i32,
+    pub value: ThreadV2ItemType,
+}
+
+#[derive(Clone, Debug, Serialize)]
+#[serde(tag = "$type")]
+pub enum ThreadV2ItemType {
+    #[serde(rename = "app.bsky.unspecced.defs#threadItemPost")]
+    Post(ThreadItemPost),
+    #[serde(rename = "app.bsky.unspecced.defs#threadItemNoUnauthenticated")]
+    NoUnauthenticated {},
+    #[serde(rename = "app.bsky.unspecced.defs#threadItemNotFound")]
+    NotFound {},
+    #[serde(rename = "app.bsky.unspecced.defs#threadItemBlocked")]
+    Blocked { author: BlockedAuthor },
+}
+
+#[derive(Clone, Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ThreadItemPost {
+    pub post: PostView,
+    pub more_parents: bool,
+    pub more_replies: i32,
+    pub op_thread: bool,
+    pub hidden_by_threadgate: bool,
+    pub muted_by_viewer: bool,
+}