fix(biome): send correct language to lsp proxy (#4773)

Since Biome understands `typescriptreact` and `javascriptreact` as
languages, we can send the `filetype` to the LSP, rather than only
sending `typescript` for both `ts` and `tsx` files, or `javascript` for
`js` and `jsx` files.

fixes: #4752

autoload/ale/handlers/biome.vim

@@ -25,6 +25,10 @@ function! ale#handlers#biome#GetCommand(buffer) abort
     \   . (!empty(l:options) ? ' ' . l:options : '')
 endfunction
 
+function! ale#handlers#biome#GetLanguage(buffer) abort
+    return getbufvar(a:buffer, '&filetype')
+endfunction
+
 function! ale#handlers#biome#GetProjectRoot(buffer) abort
     let l:biome_file = ale#path#FindNearestFile(a:buffer, 'biome.json')