Add GetDevicePublicKey

[aromaa]

Description

• Adds GetDevicePublicKey.
• Bump version.

Motivation and Context

• Allows developers to get the public key from the device certificate store.

How Has This Been Tested?

• Locally by calling CertificateManager.GetDevicePublicKey().

Screenshots

Types of changes

• Improvement (non-breaking change that improves a feature, code or algorithm)
• Bug fix (non-breaking change which fixes an issue with code or algorithm)
• New feature (non-breaking change which adds functionality to code)
• Breaking change (fix or feature that would cause existing functionality to change)
• Config and build (change in the configuration and build system, has no impact on code or features)
• Dependencies (update dependencies and changes associated, has no impact on code or features)
• Unit Tests (add new Unit Test(s) or improved existing one(s), has no impact on code or features)
• Documentation (changes or updates in the documentation, has no impact on code or features)

Checklist:

• My code follows the code style of this project (only if there are changes in source code).
• My changes require an update to the documentation (there are changes that require the docs website to be updated).
• I have updated the documentation accordingly (the changes require an update on the docs in this repo).
• I have read the CONTRIBUTING document.
• I have tested everything locally and all new and existing tests passed (only if there are changes in source code).
• I have added new tests to cover my changes.

[josesimoes]

@aromaa I was picturing this living in in the X502Cert class.... 🤔
https://github.com/nanoframework/System.Net/blob/main/nanoFramework.System.Net/X509Certificates/X509Certificate2.cs

[aromaa]

I was picturing this living in in the X502Cert class

Isn't that a bit funny? The certificate itself shouldn't know about how/where to retrieve certificates. The CertificateManager is already dealing with the certificate store so it seems like the most obvious place?