(core) Floating formula editor

Summary:
Adding a way to detach an editor. Initially only implemented for the formula editor, includes redesign for the AI part.
- Initially, the detached editor is tight with the formula assistant and both are behind GRIST_FORMULA_ASSISTANT flag, but this can be relaxed
later on, as the detached editor can be used on its own.

- Detached editor is only supported in regular fields and on the creator panel. It is not supported yet for conditional styles, due to preview limitations.
- Old code for the assistant was removed completely, as it was only a temporary solution, but the AI conversation part was copied to the new one.
- Prompting was not modified in this diff, it will be included in the follow-up with more test cases.

Test Plan: Added only new tests; existing tests should pass.

Reviewers: JakubSerafin

Reviewed By: JakubSerafin

Differential Revision: https://phab.getgrist.com/D3863

test/nbrowser/DocTutorial.ts

@@ -74,7 +74,7 @@ describe('DocTutorial', function () {
       await gu.skipWelcomeQuestions();
 
       // Make sure we have clean start.
-      await driver.executeScript('resetSeenPopups();');
+      await driver.executeScript('resetDismissedPopups();');
       await gu.waitForServer();
       await driver.navigate().refresh();
       await gu.waitForDocMenuToLoad();

test/nbrowser/RightPanel.ts

@@ -13,7 +13,7 @@ describe('RightPanel', function() {
     await mainSession.tempNewDoc(cleanup);
 
     // Reset prefs.
-    await driver.executeScript('resetSeenPopups();');
+    await driver.executeScript('resetDismissedPopups();');
     await gu.waitForServer();
 
     // Refresh for a clean start.

test/nbrowser/gristUtils.ts

@@ -960,9 +960,15 @@ export async function waitForServer(optTimeout: number = 2000) {
  * Sends UserActions using client api from the browser.
  */
 export async function sendActions(actions: UserAction[]) {
-  await driver.executeScript(`
-    gristDocPageModel.gristDoc.get().docModel.docData.sendActions(${JSON.stringify(actions)});
+  const result = await driver.executeAsyncScript(`
+    const done = arguments[arguments.length - 1];
+    const prom = gristDocPageModel.gristDoc.get().docModel.docData.sendActions(${JSON.stringify(actions)});
+    prom.then(() => done(null));
+    prom.catch((err) => done(String(err?.message || err)));
   `);
+  if (result) {
+    throw new Error(result as string);
+  }
   await waitForServer();
 }