Update dev-rules.mdc to include project structure

Author: MartinBraquet

.cursor/rules/dev-rules.mdc

@@ -1,7 +1,7 @@
 ---
 alwaysApply: true
 ---
-
+ 
 ## Project Structure
 
 - next.js react tailwind frontend `/web`
@@ -417,4 +417,4 @@ const query = renderSql(
 const res = await pg.manyOrNone(query)
 ```
 
-Use these functions instead of string concatenation.
+Use these functions instead of string concatenation.