Kitty implements OSC 5522 paste-event listings by sending one DATA
packet whose mime field decodes to the literal dot sentinel and whose
payload carries the available types as a whitespace-separated list. The
TUI previously only honored the ancillary per-type DATA-packet form, so
plain-text Kitty pastes were rejected as unsupported.
Decode the dot-listing payload during the listing phase and keep the
per-type packet path as a fallback. Also emit the follow-up OSC 5522 read
request using the Kitty protocol shape: the selected MIME list belongs in
the request payload, not in mime metadata. Sending it as metadata makes
Kitty parse an empty requested MIME list and returns no clipboard bytes,
which surfaces as an empty paste.
Add regression coverage for Kitty's text-only and multi-type listings,
and assert the payload-form read requests for default and primary
selection paste events.
Fixes#2051
roboomp
29730eb643