less: Open file (also stdin) in vim with e/E

The current file can be edited with `v` already, but this doesn't work
when reading from stdin.

.config/lesskey

@@ -1,6 +1,17 @@
 # SPDX-License-Identifier: MIT
 # Copyright (c) 2025 Julian Prein
 
+#command
+
+# NOTE: the current file can be edited with `v` already, but this doesn't work
+#       when reading from stdin
+# NOTE: ^P omits the "done" message
+#
+# edit in vim without any ANSI SGR sequences (e.g. color)
+e noaction g|$no-ansi-sgr | nvim -\n
+# edit in vim while keeping them
+E noaction g|$nvim -\n
+
 #env
 # NOTE: Lines need a trailing space when concatenating