Add list of skills/expertise from the list of codecheckers to the codechecker page

[nuest]

Including the JSON representation of the codechecker.

This information should already be present during page rendering.

Need this for codecheckers/codecheckers#63

[dxL1nus]

Is the user profile of the codechecker meant with the codechecker page?

[nuest]

Yes. Example: https://codecheck.org.uk/register/codecheckers/0000-0003-0863-9581/
All codechecker pages: https://codecheck.org.uk/register/codecheckers/