feat: Extract and show csr details

[saltiyazan]

Description

• Extract more details from the CSR
• Show the extracted details
• Show N/A if a value is missing
• Minor refactor in the code to improve the decoding of the PEM string

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that validate the behaviour of the software
• I validated that new and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[kayra1]

mostly LGTM

[kayra1]

Tentatively approved

[gruyaume]

One last detail, the rest looks good

[gruyaume]

My bad for not catching this earlier, the following fields should be displayed (at least when their value is not empty):

• Country
• State or Province
• Locality
• Organization
• Organizational Unit
• Common Name
• Alternative Names
• Email Address

Those are the fields you get to choose when using OpenSSL. Out of those, we are missing "State or Province" and "Organizational Unit".