Make :e open up a file dialog if no file name is passed in

[Chillee]

As @xelra said on the neovim gitter,

Well, when I specified a filename it did try to open a file based on the current working directory and offered to create it. For that I'd actually expect it to directly create it. And for without specifying a filename I expected a dialogue to browse for a file.

[westim]

I believe the API to enable this is not yet implemented in VSCode, but is In-Progress on the September Iteration Plan and should be released early October:

After it's promoted to stable, it should be as easy as calling this API in the right place:

vscode.commands.ExecuteCommand('vscode.window.showOpenDialog');

[Saldivarcher]

Can I try working on this using openTextDocument as suggested by @jpoon?

[jpoon]

I haven't seen any updates from @DanEEStar so he may have abandoned the PR? Feel free to take it on though @miguelsaldivar

[DanEEStar]

@miguelsaldivar I updated my pull-request. But I think here

Vim/src/cmd_line/commands/file.ts

Line 98 in 14deb22

await vscode.commands.executeCommand(

is also a possibility to use openTextDocument ?!