Add panto-rsvp: RSVP reading mode for assistant text

Standalone opt-in extension that plays the latest assistant text block one
word at a time above the input, using the core mount, input-mode and
highlight("markdown") APIs settled in pantograph's rsvp-extension-plan.
Registers /rsvp; users bind it via "ctrl+s" = "/rsvp" under [keys].

Player and config logic are pure Lua with an assert-based self-check run
against a host/timer stub, since the core APIs land separately.

1 files changed, 4 insertions, 0 deletions

diff --git a/mise.toml b/mise.toml
new file mode 100644
index 0000000..ddb4f53
--- /dev/null
+++ b/mise.toml
@@ -0,0 +1,4 @@
+[tasks.check]
+description = "Run the extension self-check inside panto's interpreter"
+dir = "{{config_root}}"
+run = "panto lua _selfcheck.lua"