A SimpleX Chat bot that answers arithmetic (closes #1)

Remove the template's HTTP service, database and fx wiring. Add exact
arithmetic on go/parser and go/constant, a client that runs simplex-chat
as a child process and drives its WebSocket API, and the bot, which keeps
an auto-accepting address and replies to each message. The image adds the
checksum-pinned simplex-chat v7.0.2 on Ubuntu 22.04.

Model: opus-5-5

.prettierignore

@@ -2,8 +2,3 @@ bin/
 data/
 go.sum
 LICENSE
-
-# Go templates are not HTML as far as prettier is concerned: the
-# {{ ... }} actions sit in attribute and element position and prettier
-# reformats them into invalid template source.
-templates/