Expose API for plugins

[KhangHLe]

Allow us to set icons through the plugin API, my use case would be to have Templater automatically set icons for specific templates. Unless it is already possible, I'd like to know how 😬

[gfxholo]

At the moment, you can just call app.plugins.getPlugin('iconic').saveFileIcon(object, icon, color).

The method expects these parameters:

• object just needs to be { id: 'Relative/Path/To/Your/File.md' }.
• icon should be a string (an icon ID / an emoji) or just null.
• color should be a string (red orange yellow green cyan blue purple pink gray / #hexcode) or just null.

After that, call getPlugin('iconic').refreshIconManagers() to update the UI. It's not a public API so you shouldn't rely on this code forever, but it works pretty well right now.

I'll think about making this easier to use in the future 💜

[KhangHLe]

Thank you! A simpler suggestion would be to have a setting to apply the current icon on the template file to the note