Resolve "Use flutter_custom_toolbox for common features"

Closes #74

See merge request !70

Resolve "Re-order ABI builds"

Closes #73

See merge request !69

Resolve "Improve build process"

Closes #72

See merge request !68

Resolve "Clean / improve / update code"

Closes #71

See merge request !67

Resolve "Normalize game architecture"

Closes #53

See merge request !65

Merge branch '69-improve-ci-cd-remove-update-step-disable-build-debug-in-master-branch' into 'master'

Resolve "Improve CI/CD, remove "update" step, disable "build-debug" in master branch"

Closes #69

See merge request !64

Resolve "Avoid print calls in production code"

Closes #68

See merge request !63

Resolve "Remove deprecation in flutter gradle plugin"

Closes #67

See merge request !62

Resolve "Use flutter linter and apply lints"

Closes #66

See merge request !61

Resolve "Upgrade framework, build tools and dependencies"

Closes #65

See merge request !60

Resolve "Fix get image from assets"

Closes #64

See merge request !59

Resolve "Add / fix images"

Closes #63

See merge request !58

Resolve "Ensure all pictures are sliced in different 5x5 tiles"

Closes #61

See merge request !56

Resolve "Include source images to repository"

Closes #62

See merge request !57

Resolve "Fix metadata"

Closes #60

See merge request !55

Resolve "Fix metadata"

Closes #59

See merge request !54

Resolve "Remove iOS variant"

Closes #57

See merge request !53

Resolve "Upgrade flutter framework and dependencies"

Closes #58

See merge request !52

Resolve "Fix application game name"

Closes #54

See merge request !51

Resolve "Enable splash screen"

Closes #56

See merge request !50