Unify control sequence automata #2183 (#2208)

Unify the dynamic, dataflow special keys automaton and the static, codeflow terminal response automaton, yielding a single automaton. Add kitty keyboard support information to `notcurses-info`. Closes #2183.

doc/man/man3/notcurses_stats.3.md

@@ -42,7 +42,7 @@ typedef struct ncstats {
   uint64_t sprixelelisions;  // sprixel elision count
   uint64_t sprixelbytes;     // sprixel bytes emitted
   uint64_t appsync_updates;  // application-synchronized updates
-  uint64_t input_events;     // EGC inputs received or synthesized
+  uint64_t input_events;     // inputs received or synthesized
   uint64_t input_errors;     // errors processing input
 
   // current state -- these can decrease

src/info/main.c

@@ -414,6 +414,7 @@ tinfo_debug_styles(const notcurses* nc, struct ncplane* n, const char* indent){
   tinfo_debug_cap(n, "vid", notcurses_canopen_videos(nc));
   tinfo_debug_cap(n, "indn", get_escape(ti, ESCAPE_INDN));
   tinfo_debug_cap(n, "gpm", ti->gpmfd >= 0);
+  tinfo_debug_cap(n, "kbd", ti->kbdlevel > 0);
   finish_line(n);
 }