Index entries record the plugin API each version needs (`engine`: the
manifest's `engines.openidea` narrowed to the API its component was built
for), and an index may list several versions of a plugin. Settings › Plugins
offers the newest version this IDE can load; with none, the plugin is shown
as incompatible with the API it needs, and downloading it is refused.
`openidea-plugin index` keeps, of each plugin, the newest version per API
requirement, so users of an older IDE keep the last version built for them;
`--download-base` makes downloads absolute, and the release workflow points
them at the release that published them. Scratch directories are now unique
per call.
l0ng-ai
af0200e2e7