Should register on main event by-demand

[DrMerfy]

Because of this lines

vscode-overtype/src/extension.ts

Lines 17 to 18 in cb4d5c6

vscode.commands.registerCommand("type", typeCommand),
vscode.commands.registerCommand("paste", pasteCommand),
this extension subscribes to that events

therefore, this check fails

https://github.com/Microsoft/vscode/blob/d4edb9abcc261846cabee6702715fe2914ae42cb/src/vs/workbench/api/node/extHostCommands.ts#L63-L65

resulting in this bug, for example lucax88x/CodeAceJumper#24

related: microsoft/vscode#13441

solution: register type command only when entering into overwrite mode

Original Issue