Fix: pin tailwindcss to version 3 in artisan command make:filament-theme

[bachacode]

Description

Before the changes the artisan command make:filament-theme would install the latest tailwindcss version which is the 4.0.0 at the current date, this would create an incompatibility as filament 3 uses tailwindcss 3 and there are some breaking changes in the syntax and plugins of this newest version of tailwindcss.

Trying to run npm run build or npm run dev with tailwindcss 4.0.0 installed would result in an error like this:

[vite:css] Failed to load PostCSS config (searchPath: D:/folder/subfolder/filament-project): [Error] Loading PostCSS Plugin failed: Package subpath './nesting' is not defined by "exports" in D:\folder\subfolder\filament-project\node_modules\tailwindcss\package.json

Error: Loading PostCSS Plugin failed: Package subpath './nesting' is not defined by "exports" in D:\folder\subfolder\filament-project\node_modules\tailwindcss\package.json

(@D:\folder\subfolder\filament-project\postcss.config.js)
    at load (file:///D:/folder/subfolder/filament-project/node_modules/vite/dist/node/chunks/dep-CDnG8rE7.js:33602:11)       
    at file:///D:/folder/subfolder/filament-project/node_modules/vite/dist/node/chunks/dep-CDnG8rE7.js:33627:16
    at Array.map (<anonymous>)
    at plugins (file:///D:/folder/subfolder/filament-project/node_modules/vite/dist/node/chunks/dep-CDnG8rE7.js:33626:8)     
    at processResult (file:///D:/folder/subfolder/filament-project/node_modules/vite/dist/node/chunks/dep-CDnG8rE7.js:33696:14)
    at file:///D:/folder/subfolder/filament-project/node_modules/vite/dist/node/chunks/dep-CDnG8rE7.js:33826:14
file: D:\folder\subfolder\filament-project\resources\css\filament\admin\theme.css

Functional changes

• Updated the artisan command make:filament-theme to explicitly install tailwindcss@3
• Ensures compatibility and avoids potential breaking changes from future versions