core: Add a provider type to track the origin of a completion

helix-core/src/completion.rs

@@ -1,6 +1,6 @@
 use std::borrow::Cow;
 
-use crate::Transaction;
+use crate::{diagnostic::LanguageServerId, Transaction};
 
 #[derive(Debug, PartialEq, Clone)]
 pub struct CompletionItem {
@@ -9,4 +9,17 @@ pub struct CompletionItem {
     pub kind: Cow<'static, str>,
     /// Containing Markdown
     pub documentation: String,
+    pub provider: CompletionProvider,
+}
+
+#[derive(Debug, PartialEq, Eq, Hash, Clone, Copy)]
+pub enum CompletionProvider {
+    Lsp(LanguageServerId),
+    Path,
+}
+
+impl From<LanguageServerId> for CompletionProvider {
+    fn from(id: LanguageServerId) -> Self {
+        CompletionProvider::Lsp(id)
+    }
 }