add add_node and add_link

[superstar54]

• Add add_node and add_link
• Make them the default in the docs

Note: the original nodes.new and links.new is still kept.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 99.41860% with 1 line in your changes missing coverage. Please review.

Project coverage is 75.25%. Comparing base (089d6ed) to head (832e0be).

Files	Patch %	Lines
tests/conftest.py	97.67%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #75      +/-   ##
==========================================
+ Coverage   75.19%   75.25%   +0.05%     
==========================================
  Files          69       69              
  Lines        4580     4591      +11     
==========================================
+ Hits         3444     3455      +11     
  Misses       1136     1136              

Flag	Coverage Δ
python-3.11	75.16% <99.41%> (+0.05%)	⬆️
python-3.9	75.23% <99.41%> (+0.05%)	⬆️

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[edan-bainglass]

Update add_node method to add_task following new convention.

A bit more context

It is important that these new AiiDA tools keep the end user not only in mind but of utmost importance. Interface like add_task and add_link don't add much to the code. However, they can have a serious impact on user experience. add_task() (one method) vs. tasks.new() (two methods) is actually a big difference w.r.t UX.

NOTE: Highly opinionated 😎

[edan-bainglass]

LGTM!