Settings refactor (#38367)

Co-Authored-By: Ben K <ben@zed.dev>
Co-Authored-By: Anthony <anthony@zed.dev>
Co-Authored-By: Mikayla <mikayla@zed.dev>

Release Notes:

- settings: Major internal changes to settings. The primary user-facing
effect is that some settings which did not make sense in project
settings files are no-longer read from there. (For example the inline
blame settings)

---------

Co-authored-by: Ben Kunkle <ben@zed.dev>
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: Anthony <anthony@zed.dev>

crates/language/src/language.rs

@@ -22,8 +22,8 @@ mod toolchain;
 #[cfg(test)]
 pub mod buffer_tests;
 
-pub use crate::language_settings::EditPredictionsMode;
 use crate::language_settings::SoftWrap;
+pub use crate::language_settings::{EditPredictionsMode, IndentGuideSettings};
 use anyhow::{Context as _, Result};
 use async_trait::async_trait;
 use collections::{HashMap, HashSet, IndexSet};