[Obs AI Assistant] Move esql docs to dir that does not get ... (#174583)

any folder called `docs` is automatically deleted when creating a
distributable. Rename it to `esql_docs` so this doesn't happen. We need
tests, but will tackle that separately. Not sure how to write tests for
the distributable.

x-pack/plugins/observability_ai_assistant/server/functions/esql/index.ts

@@ -30,7 +30,7 @@ const loadSystemMessage = once(async () => {
 });
 
 const loadEsqlDocs = once(async () => {
-  const dir = Path.join(__dirname, './docs');
+  const dir = Path.join(__dirname, './esql_docs');
   const files = (await readdir(dir)).filter((file) => Path.extname(file) === '.txt');
 
   if (!files.length) {