STYLE: Fix acronyms, correct files names, correct doxygen class names, block comments, removed unneeded virtuals, removed constructor/destructor briefs, fixed some class briefs, fixed namings in SWIG wrapper, fixed some typos/bad comments

BUG: Input (VR, key, mouse) updated per scene update instead of per render

See merge request iMSTK/iMSTK!752

STYLE: Enforce coding guide

See merge request iMSTK/iMSTK!750

BUG: Fix json vr actions path name

See merge request iMSTK/iMSTK!751

BUG: Critical nodes not resolved in complex cases, critical node resolve...

See merge request iMSTK/iMSTK!749

BUG: Critical nodes not resolved in complex cases, critical node resolve tests, write task graph on finding cycle, remove unused nodes & critical resolve in building scene task graph

REFAC: Clear warnings fix lambda uncrustify

See merge request iMSTK/iMSTK!747

REFAC: ViewerVTK, RenderingVTK as Separate Libraries

See merge request iMSTK/iMSTK!711

REFAC: Interactor style and keyboard control refactor to fix dependencies, continued library reorganization

Upgrade to VTK 9.1

See merge request iMSTK/iMSTK!739