Use spaces instead of tabs

[xtqqczze]

• Use 4 spaces instead of tabs in general
• Use 2 space tabs for *.{json,yaml,yml} (match microsoft/vscode, PowerShell/PowerShell)
• Specify indent size and style in EditorConfig

[TylerLeonhardt]

please revert vscode.proposed.d.ts . That must have tabs because that file is kept up to date with a file in the vscode repo which uses tabs

[TylerLeonhardt]

^

[corbob]

Would it be an idea to add editorconfig to the recommended extensions?

Alternatively: should the settings being put in editorconfig just be put in the vscode workspace settings? PSES uses editorconfig presumably because you could use any editor with it, but is it safe to assume anyone editing this project is using vscode?

[rjmholt]

Seems like if it works just as well in .editorconfig, it's best to put in there

[TylerLeonhardt]

Thanks!

[xtqqczze]

@corbob thanks for the suggestion, see #2922