Deprecate misc instant/*.vim files about vim-maktaba HOT 2 OPEN

Looking around for existing instant/ files, I found a couple interesting cases besides flags.vim:

• Pre-configuring default settings for vim that can be overridden later in vimrc. May need to go in autoload helpers if they can't use other tricks to avoid stomping on users' explicit config.
• Registering hooks with other plugins. I suspect these actually don't need to be instant.
• Attempts at automatic dependency management. These should probably just be dropped to no longer be automatic, but to give clear warnings if they're installed without essential dependencies.

from vim-maktaba.

And since this will require a plugin-by-plugin migration process, I'd want users to be able to easily report issues to plugin maintainers and have an escape hatch to re-enable the legacy behavior. The override could look something like this:

call maktaba#EnableLegacyInstantFilesForPlugins(['someplugin', 'codefmt', 'syncopate'])

taking a list of plugin names that still need legacy behavior and ignoring instant files for everything else. You could opt-in for ALL your plugins like:

call maktaba#EnableLegacyInstantFilesForPlugins([])

and at some point we'd update maktaba to make that the default behavior.

from vim-maktaba.