VSCODE: add font size settings

[no-mood]

Currently, the HM VS Code module sets the font but not its size. There are many options we can set, here is an example:

    "customPresentationMode.overrides": {
        "debug.console.fontSize": 26,
        "editor.fontSize": 26,
        "markdown.preview.fontSize": 26,
        "terminal.integrated.fontSize": 26,
    },
    "debug.console.fontSize": 16,
    "editor.fontSize": 16,
    "markdown.preview.fontSize": 16,
    "terminal.integrated.fontSize": 16,

We could set them according to the four types