feat(database): add a table for post comments

database/src/main/sqldelight/dev/msfjarvis/claw/database/local/PostComments.sq

@@ -0,0 +1,17 @@
+import kotlin.String;
+import kotlin.collections.List;
+
+CREATE TABLE IF NOT EXISTS PostComments(
+  postId TEXT NOT NULL PRIMARY KEY,
+  commentIds TEXT AS List<String> NOT NULL
+);
+
+rememberComments:
+INSERT OR REPLACE
+INTO PostComments
+VALUES ?;
+
+getCommentIds:
+SELECT *
+FROM PostComments
+WHERE postId = ?;