zeta: Send up diagnostics with prediction requests (#24384)

This PR makes it so we send up the diagnostic groups as additional data
with the edit prediction request.

We're not yet making use of them, but we are recording them so we can
use them later (e.g., to train the model).

Release Notes:

- N/A

---------

Co-authored-by: Nathan <nathan@zed.dev>

crates/language/src/language.rs

@@ -32,10 +32,7 @@ use gpui::{App, AsyncApp, Entity, SharedString, Task};
 pub use highlight_map::HighlightMap;
 use http_client::HttpClient;
 pub use language_registry::{LanguageName, LoadedLanguage};
-use lsp::{
-    CodeActionKind, InitializeParams, LanguageServerBinary, LanguageServerBinaryOptions,
-    LanguageServerName,
-};
+use lsp::{CodeActionKind, InitializeParams, LanguageServerBinary, LanguageServerBinaryOptions};
 use parking_lot::Mutex;
 use regex::Regex;
 use schemars::{
@@ -73,12 +70,12 @@ use util::serde::default_true;
 
 pub use buffer::Operation;
 pub use buffer::*;
-pub use diagnostic_set::DiagnosticEntry;
+pub use diagnostic_set::{DiagnosticEntry, DiagnosticGroup};
 pub use language_registry::{
     AvailableLanguage, LanguageNotFound, LanguageQueries, LanguageRegistry,
     LanguageServerBinaryStatus, QUERY_FILENAME_PREFIXES,
 };
-pub use lsp::LanguageServerId;
+pub use lsp::{LanguageServerId, LanguageServerName};
 pub use outline::*;
 pub use syntax_map::{OwnedSyntaxLayer, SyntaxLayer, ToTreeSitterPoint, TreeSitterOptions};
 pub use text::{AnchorRangeExt, LineEnding};