Add user warning when file was not saved before completion

package.json

@@ -1,7 +1,7 @@
 {
   "name": "coqpilot",
   "displayName": "СoqPilot",
-  "description": "An ai based completion extension for Coq interactive prover.",
+  "description": "An AI-based completion extension for Coq interactive prover.",
   "icon": "etc/img/logo.ico",
   "repository": {
     "type": "git",

src/extension/coqPilot.ts

@@ -148,6 +148,15 @@ export class CoqPilot {
             "completion-started",
             "CoqPilot has started the completion process"
         );
+
+        if (editor.document.isDirty) {
+            showMessageToUser(
+                EditorMessages.saveFileBeforeCompletion,
+                "warning"
+            );
+            return;
+        }
+
         const [completionContexts, sourceFileEnvironment, processEnvironment] =
             await this.prepareForCompletions(
                 shouldCompleteHole,

src/extension/editorMessages.ts

@@ -17,6 +17,9 @@ export namespace EditorMessages {
     export const noProofsForAdmit = (lineWithAdmitNumber: number) =>
         `CoqPilot failed to find a proof for the admit at line ${lineWithAdmitNumber}.`;
 
+    export const saveFileBeforeCompletion =
+        "Please note that this file has not been saved after the updates. Currently CoqPilot requires the file to be saved before the completion.";
+
     export const noAdmitsFound =
         "No admits were found in this selection/file. Make sure your coq-lsp is running correctly.";