consider kitty keyboard events PRESS by default

Whenever we get a keyboard event while using the Kitty
keyboard protocol (used by kitty and foot), unless there
is an explicit evtype provided, assume it to be a press.
We already did this for kitty-only types, but we need do
it for all possible inputs. Closes #2578.

src/lib/in.c

@@ -108,7 +108,8 @@ typedef struct inputctx {
   // been taken, both become NULL.
   struct initial_responses* initdata;
   struct initial_responses* initdata_complete;
-  bool failed;          // error initializing input automaton, abort
+  int kittykbd;        // kitty keyboard protocol support level
+  bool failed;         // error initializing input automaton, abort
 } inputctx;
 
 static inline void
@@ -495,6 +496,13 @@ load_ncinput(inputctx* ictx, ncinput *tni){
       }
     }
   }
+  // if the kitty keyboard protocol is in use, any input without an explicit
+  // evtype can be safely considered a PRESS.
+  if(ictx->kittykbd){
+    if(tni->evtype == NCTYPE_UNKNOWN){
+      tni->evtype = NCTYPE_PRESS;
+    }
+  }
   if(tni->modifiers == NCKEY_MOD_CTRL){ // exclude all other modifiers
     if(ictx->linesigs){
       if(tni->id == 'C'){
@@ -1068,7 +1076,8 @@ kitty_keyboard_cb(inputctx* ictx){
   if(ictx->initdata){
     ictx->initdata->kbdlevel = level;
   }
-  loginfo("kitty keyboard protocol level %u", level);
+  loginfo("kitty keyboard level %u (was %u)", level, ictx->kittykbd);
+  ictx->kittykbd = level;
   return 2;
 }