[Feature] Implement Blender-style global 3D viewport shortcuts (G/R/S)#313

Szy-Cathay wants to merge 2 commits intodonkeyProgramming:masterdonkeyProgramming/TheAssetEditor:masterfrom

Szy-Cathay:core/blender-like-operation-farmeworkSzy-Cathay/TheAssetEditor-Szy:core/blender-like-operation-farmeworkCopy head branch name to clipboard