PSReadLine Keyhandlers should have a reset to default

[StevenBucher98]

Prerequisites

• Write a descriptive title.

Description of the new feature/enhancement

I forget which key handlers I set and may be nice to have a simple way to reset all key handlers to their default values. Potentially something like Restore-PSReadLineKeyHandler -Default, or make it extensible such that we can import/export keyhandler config files so folks can share and use key handler files. i.e Restore-PSReadLineKeyHandler -Path ./MyKeyHandlers.json or something like this. Curious if folks use key handlers often and if this is something that may be useful.

Proposed technical implementation details (optional)

No response

[daxian-dbw]

A workaround as of today: to reset the default key bindings for a specific edit mode, just run Set-PSReadLineOption -EditMode <edito-mode>

[daxian-dbw]

This issue is more aligned with supporting configuration file for PSReadLine configuration. We won't do key-binding specific import/export, but when it's fully supported to configure PSReadLine with a confg file, then the ask of this issue is also resolved.