[TS] Implement Post Modal with Text Input and Console Output

[a-shigemichi]

Summary

Create a modal that opens when the post button is clicked. The modal should contain a text input field. When the Post button inside the modal is pressed, the entered text should be output to the console.

Parent issue

https://github.com/okuda-seminar/Twitter-Clone/issues/398

Reference

Notes

None

Deadline

2024/8/30