The start index of the link on [TerminalLinkContext.line](#TerminalLinkContext.line].
The tooltip text when you hover over this link.
If a tooltip is provided, is will be displayed in a string that includes instructions on
how to trigger the link, such as {0} (ctrl + click)
. The specific instructions vary
depending on OS, user settings, and localization.
The length of the link on [TerminalLinkContext.line](#TerminalLinkContext.line]