[FEATURE ADD] Create proper with Qt-based GUI with Pyside6

[HunterAP23]

Describe the feature that is being tested/implemented
Replace existing GUI generated with gooey tool with GUI generated using the Pyside6 library.

• General GUI:
  • Text box to display console output, shared between all suite modules
  • Progress bar to display progress of current task
  • Option to load existing TOML configuration file
  • Option to load progress TOML file
• Encoder application:
  • Display left-hand list box that lists the individual reference files
  • Have text box showing the location of the reference files.
  • Have button for the reference files text box to open a single file / multi-file / single directory chooser.
  • Have a similar text box and button combo for choosing a directory where the encoded output files will be stored.
  • Selectors for different options (need to do more research on what to do for each option):
    • Encoders
      • Individual options for each encoder
    • B-frames
    • Bit rates
    • Hardware acceleration
    • Specify a decoder on a per-reference file basis
    • Frame rate (only allow down sampling)
    • Resolution (only allow down scaling)
      • Provide options for what scaling method to use (bilinear, bicubic, lanzcos, nearest neighbor, area, etc.)
    • Constant bit rate vs Variable bit rate vs Constant Rate Factor / Constant Quantization Parameter
• Calculator application:
  • VMAF arguments
    • Models (normal, 4k, NEG) and/or user-provided model
    • SSIM / MS-SSIM / PSNR / etc. features
    • Subsamples
    • Threads
    • Log format (xml, json, csv)
  • FFmpeg arguments
    • FFmpeg executable location (by default looks for it in env path)
    • Decode threads
    • Hardware accelerated decoding
  • General arguments
    • Number of FFmpeg processes to run at one time
      • Limited to N processes with 1 thread per process OR one process with N threads (where N = number of threads available on the system)
    • Location of reference file(s)
    • Location of encoded output file(s)
    • Location of where VAMF results should be stored
• Plotter application:
  • Location of VMAF results
  • Location of where to store the output graphs
  • Whether or not to produce a photo or video graph, or both
  • Resolution of the given photo graph
  • Resolution of the given video graph
  • Frame rate of the output video graph
  • Whether the photo graph should be transparent or not
  • Whether the video graph should be transparent or not
  • Output format of the photo graph
  • Output format of the video graph

List any relations to other issues in this repository or in other repositories
Provide a list of issues.