allow JSX and TSX commands

[swyxio]

currently the command discovery rule here:

config/src/plugin.ts

Line 155 in d84a238

'**/*.+(js|ts)',

only matches .js and .ts files. However, .tsx files are also valid typescript. As react-ink becomes a thing, we should enable that too.

Maybe just add another regex for *x files? happy to PR this if y'all like it