Improve /pos and /play indexing, labeling + fix demo/cutscene titles

[rr-]

Checklist

• I have read the coding conventions
• I have added a changelog entry about what my pull request accomplishes, or it is an internal change
• I have added a readme entry about my new feature or OG bug fix, or it is a different change

Description

Resolves #2604. Resolves #2605.

[github-actions]

Download the built assets for this pull request:

• TR1X-4.8.3-129-g0ae7fb6-linux.zip
• TR1X-4.8.3-129-g0ae7fb6-mac.zip
• TR1X-4.8.3-129-g0ae7fb6-win.zip
• TR1X-4.8.3-129-g0ae7fb6-win-installer.zip
• TR2X-0.9.2-126-g0ae7fb6-linux.zip
• TR2X-0.9.2-126-g0ae7fb6-mac.zip
• TR2X-0.9.2-126-g0ae7fb6-win.zip

[walkawayy]

TR1, UB, and TR2 LGTM. I don't have Golden Mask installed which I should get on.

My only comment is you can use play 21 in TR1 for example and it loads the title screen and says Loading Current Position. I know it's a legacy level thing that exists, but I just wanted to mention it in case.

[aredfan]

The console logs in demos and cutscenes now display the titles as expected, thank you.

The /pos command remains unavailable during TR1 cutscenes.

[rr-]

I included a check to avoid repeating itself so it now says Cutscene 3 Room: 0 rather than Cutscene 3 (Cut Scene 3) Room: 0. Also went with a Cutscene wording.