chore add core rust project files and diesel migrations

Track required workspace crates, scripts, and historical diesel migrations so the repository contains the complete runnable backend baseline.

Made-with: Cursor

htyws_models/migrations/2022-03-18-061022_modify_daka_tbl/up.sql

@@ -0,0 +1,23 @@
+-- Your SQL goes here
+
+alter table daka
+    drop column daka_date;
+
+alter table daka
+    add start_date timestamp not null;
+
+alter table daka
+    drop column student_id;
+
+alter table daka
+    rename column beizhu to "desc";
+
+alter table daka
+    add duration_days int not null;
+
+alter table daka
+    add name varchar not null;
+
+alter table daka
+    add owner_id varchar not null;
+