reset terminfo: add an empty OSC sequence to rs1 string

In OSC/OTH mode, the parser accumulate bytes until it fills up or
encounters some end-of-osc sequence.
After entering in either of these mode by mistake, for example by
displaying random bytes (e.g. cat a binary) nothing would print anymore
but input would still work.

In that situation, being able to hit `reset` and recover a usable
terminal helps.

You can try with `echo -e '\xc2\x9e'` for PM

kitty/terminfo.py

@@ -227,8 +227,8 @@ string_capabilities = {
     'rmso': r'\E[27m',
     # Exit underline mode
     'rmul': r'\E[24m',
-    # Reset string1
+    # Reset string1 (empty OSC sequence to exit OSC/OTH modes, and regular reset)
-    'rs1': r'\Ec',
+    'rs1': r'\E]\E\\\Ec',
     # Save cursor
     'sc': r'\E7',
     # Set background color

terminfo/kitty.terminfo

@@ -121,7 +121,7 @@ xterm-kitty|KovIdTTY,
 	rmkx=\E[?1l,
 	rmso=\E[27m,
 	rmul=\E[24m,
-	rs1=\Ec,
+	rs1=\E]\E\\\Ec,
 	sc=\E7,
 	setab=\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m,
 	setaf=\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m,