Add built-in line numbers support for JsonText

[usmonovshohruxmirzo]

Is your feature request related to a problem? Please describe.
JsonText does not show line numbers, which makes it harder to debug and reference large JSON outputs in the terminal.

Describe the solution you'd like
Add an option to enable line numbers in JsonText.

• Example:

new JsonText(json, showLineNumbers: true);

Describe alternatives you've considered
I manually format the JSON, split it into lines, and render it using a Table with line numbers. This works but loses the native JsonText formatting, structure handling, and built-in styling.

Additional context
Useful for debugging, logging, and tools that display large JSON data in CLI apps.

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[patriksvensson]

Rather than building this into the JSON widget, I would much rather see a widget (an IRenderable) that wraps another IRenderable and displays line numbers for it.

i.e.

AnsiConsole.Write(new LineNumbers(new JsonText(json)));

[usmonovshohruxmirzo]

@patriksvensson This idea is also good!