📎 Change `bit_flags` for `enumflags2`

[Emanuele Stoppa]

Description

Inside the biome_js_analyze, we started using enumflags2, and the DX has been positive.

This is a task to remove bit_flags from the codebase, and use enumflags2. This is an example of definition:

biome/crates/biome_js_syntax/src/modifier_ext.rs

Lines 12 to 27 in b75d30e

 #[enumflags2::bitflags] 
 #[repr(u16)] 
 pub enum Modifier { 
     // modifiers must be sorted by precedence. 
     Decorator = 1 << 0, 
     BogusAccessibility = 1 << 1, 
     Private = 1 << 2, 
     Protected = 1 << 3, 
     Public = 1 << 4, 
     Declare = 1 << 5, 
     Static = 1 << 6, 
     Abstract = 1 << 7, 
     Override = 1 << 8, 
     Readonly = 1 << 9, 
     Accessor = 1 << 10, 
 } 

Feel free to send multiple PRs to address this, we use bit_flags in different places of the repository.