Ad-hoc sign Mac builds

[OverloadedOrama]

This should solve the "Pixelorama is damaged" error on macOS, as suggested by #516 (comment).

[bruvzg]

Signing did not work correctly since app have non-executable files (pixelorama_data folder) in the MacOS subfolder, theses should go into the Resources subfolder instead. Also, icon seems to be replaced after signing instead of doing it before.

Signature check log:

~ % codesign -vvvv ./Pixelorama.app

./Pixelorama.app: a sealed resource is missing or invalid
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/vline_3x3.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Grass/~Grass4.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Grass/~Grass5.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Grass/~Grass1.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Grass/~Grass2.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Grass/~Grass3.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/circle_blended.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Snow.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Star/~star5.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Star/~star4.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Star/~star6.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Star/~star3.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Star/~star2.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/Star/~star1.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/pixelorama_icon.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/hline_3x3.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Brushes/godot_icon.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/Metro_tile.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/Gravel.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/Yellow_Marble.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/Purple_Texture.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/White_Marble.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/small_stonebricks.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/wooden_planks_2.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/Wooden_planks_1.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/Ground_leaves.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/Brick.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Patterns/Light_Blue_Texture.png
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Palettes/Triad.tres
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Palettes/BubbleGum16.tres
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Palettes/Shades.tres
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Palettes/Monochromatic.tres
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Palettes/Default.tres
file added: /Users/bruv/Downloads/Pixelorama.app/Contents/MacOS/pixelorama_data/Palettes/Complementary.tres
file modified: /Users/bruv/Downloads/Pixelorama.app/Contents/Resources/icon.icns

[OverloadedOrama]

Okay, I think I may have fixed it now.

[bruvzg]

Okay, I think I may have fixed it now.

Now it's working as expected, with can't check it for malicios software popup, and can be started by clicking Open Anyway it the Security & Privacy setting page.

[OverloadedOrama]

Awesome, I will go ahead and merge then. Thank you for your help!