style(ui): improve layout and responsiveness of tuition class page

This commit adjusts the styling on the 'Middle/High School Tuition Class' page to enhance its appearance and readability,
particularly on mobile devices.

- Implemented responsive padding for the main page and content container.
- Justified the main text block for better readability.
- Centered the student name badges.
- Added configuration files for the `repomix` project analysis tool.

.repomixignore

@@ -0,0 +1,10 @@
+# Add patterns to ignore here, one per line
+# Example:
+# *.log
+# tmp/
+pnpm-workspace.yaml
+public/
+app/assets/
+docs/
+*.md
+countries.ts