Allow users to validate Chocolatey sources directly

[pauby]

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Checklist

• I have verified this is the correct repository for opening this issue.
• I have verified no other issues exist related to my request.

Is Your Feature Request Related To A Problem? Please describe.

In this issue comment the user would have benefitted from Chocolatey CLI being able to validate the configured sources.

Describe The Solution. Why is it needed?

Adding a command such as choco source validate (naming is hard) to allow all, or a specific source (perhaps using choco source validate --source <SOURCE>) to be "checked" to ensure Chocolatey CLI can use it.

What "checked" means we would need to define. But it could be as simple as retrieving a package list, or:

• Check if it's reachable. Is the URL correct?
• What type of source is it: v2 oData, v3 JSON, local folder / shared drive, etc.
• If authentication is provided, can we authenticate?
• Does it have a search endpoint?

Additional Context

No response

Related Issues

• Issue comment where the idea came from.

[TheCakeIsNaOH]

Unsure if a dup or just related to #3602

[pauby]

🤦 It is. As this one has two upvotes, to keep them I'll mark #3602 as a duplicate and bring some information from that issue over here.