Improve addmethodnode

[thomvet]

This introduces high level interface functions for convenient adding and calling of method nodes.

Short summary below:

• Introduce JUA_Argument wrappers for UA_Argument
• Tests for JUA_Argument
• Rethink and implement JUA_Sever_addNode(...) for method nodes.
• Tests for JUA_Server_addNode
• JUA_Client_call making calling method nodes using the client api easier.
• Tests for JUA_Client_call
• JUA_Server_call making calling method nodes using the server api easier.
• Tests for JUA_Server_call
• Docstrings for everything
• Improve error messages for ValueRankArraySizeConsistencyError
• Tutorial how to add method nodes to server and how to call them via Server and Client API.

[thomvet]

The failing testset works on [email protected] ([email protected]), but not with 1.3.11 - weird. And obviously not with 0.2.0 and 1.4.x.

I am suspecting that the problem is in the upstream library. Will investigate (and post an issue there), but likely mark these tests as broken right now.

[codecov]

Codecov Report

Attention: Patch coverage is 81.18812% with 57 lines in your changes missing coverage. Please review.

Project coverage is 45.33%. Comparing base (acb77e7) to head (e7e97d9).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/exceptions.jl	12.00%	22 Missing ⚠️
src/highlevel_types.jl	84.90%	16 Missing ⚠️
src/highlevel_client.jl	87.09%	8 Missing ⚠️
src/client.jl	42.85%	4 Missing ⚠️
src/helper_functions.jl	88.57%	4 Missing ⚠️
src/attribute_generation.jl	77.77%	2 Missing ⚠️
src/highlevel_server.jl	97.43%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
+ Coverage   42.28%   45.33%   +3.04%     
==========================================
  Files          13       13              
  Lines        4377     4601     +224     
==========================================
+ Hits         1851     2086     +235     
+ Misses       2526     2515      -11     

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[thomvet]

Ok, all issues worked around; should be ready for review @martinkosch