Quick List Formatting sample illustrating recreating the Title Column

Title Column.json

{
    "elmType": "div",
    "children": [
        {
            "elmType": "button",
            "customRowAction": {
                "action": "defaultClick"
            },
            "attributes": {
                "class": "ms-fontColor-neutralPrimary ms-borderColor-white ms-borderColor-neutralPrimary--hover"
            },
            "style": {
                "font-size": "14px",
                "background-color": "transparent",
                "border-top": "none",
                "border-left": "none",
                "border-right": "none",
                "border-bottom-width": "1px",
                "border-bottom-style": "solid",
                "outline": "none",
                "cursor": "pointer",
                "padding": "0",
                "margin": "0",
                "display": "inline",
                "text-align": "left",
                "border-radius": "0",
                "min-height": "0",
                "white-space": "nowrap"
            },
            "txtContent": "=@currentField + '!'"
        }
    ]
}