obs-powershell pseudotype improvements

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The pseduotypes in obs-powershell need some updates:

For starters, their names should be simplified (while keeping their exisiting .PSTypenames)

• [x] #173
• [x] #174
• [x] #175

Additionally, various improvements can be made:

• [x] #170
• [x] #178
• [ ] #182
• [ ] #183
• Transform Improvements:
  • [ ] #171
  • [x] #172
• Filter Improvements:
  • [x] #181
  • [ ] #184

And a couple of pseudotypes can be added:

• [ ] #144
• [ ] #176
• [x] #177