Add TF2 raw scenes for scenes.image building

[conneath]

this was done with HL2 + episodes, it'd be nice if this was also done for TF2
VSIF2VCD doesn't work at all with TF2, so i can't use that to extract scenes manually

[Wolfcl0ck]

I second this as a necessity, but in the meantime, if you're at least able to settle for adding additional scenes there is a way to load raw scenes in addition to the scenes.image as documented on the scenes.image page on the wiki.

...Sweet mother of God this post was from 3 months ago we are so screwed...