Test: Playwright tests for tmtv

[dxlin]

Context

Added playwright tests for:

1. Basic TMTV Loading
2. SUV re-calculates upon data reload
   -> Updating SUV parameters (time/injected dose) doesn't change the SUV[Bug] #3805
3. Modality is PROPCNT when not calculable
   -> Units displayed as RAW in TMTV mode rather than PROPCNTS[Bug] #3760
4. TMTV CT/PT alignment
   -> TMTV Coronal PET Viewport Instance Sometimes Incorrect [Bug]  #4035

Please feel free to make suggestions/removals/pick and choose useful bits.

Changes & Results

Testing

Checklist

PR

• [] My Pull Request title is descriptive, accurate and follows the
  semantic-release format and guidelines.

Code

• [] My code has been well-documented (function documentation, inline comments,
  etc.)

Public Documentation Updates

• [] The documentation page has been updated as necessary for any public API
  additions or removals.

Tested Environment

• [] OS:
• [] Node version:
• [] Browser:

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[IbrahimCSAE]

I will review this once i get the chance, looks great though, might need to make some small adjustments to make it work in the CI.