Add basic stream filter support

[VesCodes]

Hey, we've been using this modification for a couple years now to exclude some parts of streams during replication. Figured other users might find it useful as-is or it could otherwise start a conversation about supporting this more effectively.

Sample configuration snippet:

stream_views:
- src: //UE5/Main
  targ: //EpicGames/UE5/Main
  type: mainline
  parent: 

stream_exclude:
- "//UE5/Main/Samples/..."
- "//UE5/Main/EngineTest/..."
- "//UE5/Main/QAGame/..."