Picker: Add API picker

[sam-mellor]

Picker: Add API Picker

Description

Adds API picker lib to source parts from remote backend.

Usage: set FBRK_PICKER=api

TODO:

• incorporate unmerged PR(s): Add: JLCPCB header picker #78, ...
• refactor (parametrize) picker tests
• embed API key
• update project template

Checklist

Please read and execute the following:

• My code follows the coding guidelines of this project
• My PR title is following the contribution guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I ran Black to format my code

Code of Conduct

By submitting this issue, you agree to follow our Code of Conduct:

• I agree to follow this project's Code of Conduct

[iopapamanoglou]

Looks already pretty good!

• Have a look at my minor changes
• A bit careful with when raising PickErrors vs other Exceptions: PickErrors are caught so don't raise them for static programming errors
• Turn on your type checking in cursor
  
• API should be a singleton, conditional init creates weird behavior
• (nearly) all test cases pass, but the examples don't work with the api picker (no parts found for resistor)

[iopapamanoglou]

Looks great! Only fixing some bugs left.
Some examples still seem to not work properly.
Nearly there 😁

[iopapamanoglou]

Amazing!