Default keybindings for opening previews in markdown files?

[alcarney]

Expected behavior

It should be easy to open esbonio's preview from within a markdown file, either through keyboard shortcut or editor menu button

Actual behavior

The when clauses in the extension's package.json need to be updated to consider markdown files.

Log output

No response

(Optional) Settings from conf.py

No response

[alcarney]

Quoting myself from the above commit

Whereas the reStructuredText part of the extension could copy the
patterns for previews established by VSCode's markdown support, doing
so for markdown files would (surprise, surprise!) create conflicts.

So, the toolbar button and command names have been "re-branded" to
make them distinct from the built-in markdown ones. The
reStructuredText part of the extension keeps its existing
keybindings (for now?) and no keybindings have been set for the
markdown side.

Open for suggestions as to what a good default keybinding could be :)