VS Code keybindings to fix bad defaults

keybindings.json

// Place your key bindings in this file to override the defaults
[
  { "key": "cmd+1","command": "workbench.action.openEditorAtIndex1" },
  { "key": "cmd+2","command": "workbench.action.openEditorAtIndex2" },
  { "key": "cmd+3","command": "workbench.action.openEditorAtIndex3" },
  { "key": "cmd+4","command": "workbench.action.openEditorAtIndex4" },
  { "key": "cmd+5","command": "workbench.action.openEditorAtIndex5" },
  { "key": "cmd+6","command": "workbench.action.openEditorAtIndex6" },
  { "key": "cmd+7","command": "workbench.action.openEditorAtIndex7" },
  { "key": "cmd+8","command": "workbench.action.openEditorAtIndex8" },
  { "key": "cmd+9","command": "workbench.action.openEditorAtIndex9" },
  { "key": "cmd+0","command": "workbench.action.lastEditorInGroup" },
  { "key": "cmd+shift+[","command": "workbench.action.previousEditor" },
  { "key": "cmd+shift+]","command": "workbench.action.nextEditor" }
]