Add empty tailwind.css file

[RustGrow]

When creating a project, just add creating an empty tailwind.css file to assets folder so you don't get a missing file error that bogs you down right away. When starting the server tailwind css will then fill it up by itself.

Dioxus version: 0.6.0-rc.0
Rust version: rustc 1.83.0 (90b35a623 2024-11-26)
OS info: Windows 11
App platform: all

[ealmloff]

Closed by #53