Support .editorconfig (#19455)

Closes https://github.com/zed-industries/zed/issues/8534
Supersedes https://github.com/zed-industries/zed/pull/16349

Potential concerns:
* we do not follow up to the `/` when looking for `.editorconfig`, only
up to the worktree root.
Seems fine for most of the cases, and the rest should be solved
generically later, as the same issue exists for settings.json
* `fn language` in `AllLanguageSettings` is very hot, called very
frequently during rendering. We accumulate and parse all `.editorconfig`
file contents beforehand, but have to go over globs and match these
against the path given + merge the properties still.
This does not seem to be very bad, but needs more testing and
potentially some extra caching.


Release Notes:

- Added .editorconfig support

---------

Co-authored-by: Ulysse Buonomo <buonomo.ulysse@gmail.com>

crates/languages/src/yaml.rs

@@ -101,7 +101,7 @@ impl LspAdapter for YamlLspAdapter {
 
         let tab_size = cx.update(|cx| {
             AllLanguageSettings::get(Some(location), cx)
-                .language(Some(&"YAML".into()))
+                .language(Some(location), Some(&"YAML".into()), cx)
                 .tab_size
         })?;
         let mut options = serde_json::json!({"[yaml]": {"editor.tabSize": tab_size}});