Refactor/ trim whitespaces

[dimateos]

Addresses #2341

I created the following script to ONLY trim trailing white spaces:

• src: https://github.com/dimateos/Open-Cinder/blob/refactor/trim-whitespaces/tools/ci/trim_whitespaces.sh
• usage: displayed with --help
• config: has default target FOLDERS and EXTENSIONS, but can be set by args too
  • DEFAULT_FOLDERS=("src/cinder" "include/cinder" "test" "samples")
  • DEFAULT_EXTENSIONS=("*.cpp" "*.h" "*.mm" "*.java" "*.txt" "*.rc" "*.glsl" "*.frag" "*.vert" "*.comp")
• preview: you can use --preview to see what would be targeted beforehand
• example: ./trim_whitespaces.sh --path ../../ --folders test

Then I applied the trimming in separate commits per parent folders:

• Feel free to squash the commits
• Or use a CI bot so the line changes are not assigned to me whatever

I think this is very worth considering!

at least this PR can be used as a diff for what would be trimming the whole sources...