misc: drop stale macro-queue comment, note multicursor in TODOS

The comment in main.c restated the condition; the loop body already
makes the intent obvious. Add an [IN-PROGRESS] entry for multicursor
support to track ongoing work.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: halicea

TODOS.md

@@ -33,3 +33,6 @@ Keeping track of the list of open buffers at the current directory
 Ideation
 
 ## [DONE] Imports sanitization
+
+## [IN-PROGRESS] Multicursor support
+

src/main.c

@@ -133,8 +133,6 @@ int main(int argc, char *argv[]) {
     while (1) {
         ed_render_frame();
 
-        /* If there are keys in the macro queue, process them immediately
-         * without waiting for stdin */
         if (macro_queue_has_keys()) {
             ed_process_keypress();
             continue;