Install Plugin from Package File now takes an `.oiplugin`, a `.zip` or a
package folder's `plugin.toml`, and goes through the same install page
(capabilities, signature, consent) as every other install.
- A zip may hold the package at its root or in its only folder, as zipping
the folder makes; archiver metadata (`__MACOSX`, `.DS_Store`, `._*`) is
left out. A zip without a `plugin.toml` there, such as an IntelliJ plugin,
is refused with a message saying so. Unsafe paths, links and size limits
are checked as for `.oiplugin` files.
- Picking a `plugin.toml` installs its folder.
Co-authored-by: florentvdry <[email protected]>
l0ng-aiтаflorentvdry
a7b7616da9