[Feature] Add Organized flag to scenes

[WithoutPants]

Is your feature request related to a problem? Please describe.
Users have expressed a desire to exclude scenes from the auto-tagger. It would also be useful information to query on to be able to exclude scenes that are complete from a metadata point of view.

Describe the solution you'd like
Add an "Organized" flag to scenes. Scenes with this flag set to true should be excluded from the auto-tagger and should be excluded by default from the filename parser as well. It should be possible query scenes based on the value of this flag.

[bnkai]

I think it was mentioned again in the discord channel and piere-delecto's script already uses this approach, can't we just use some system reserverd tags ? For the specific case if a scene has a say stash_metadata_locked tag applied then no automatic action regarding mutation of metadata should occur ( auto-tagger, list from filename parser ).
If a flag is to be used there should be a filter that makes it easy for the user to find the scenes he flagged.

[WithoutPants]

This approach would work if we really wanted to avoid a schema modification, but in my opinion is a misuse/conflation of the tag concept. A flag is a cleaner approach, has a clearer purpose and doesn't pollute the user's tag collection with a system-only entry.