REVIT-244971 - POC for analyzer to issue warnings for Dynamo custom attribute NodeObsolete

[Mikhinja]

• add analyzer to detect usage of nodes (functions) marked with NodeObsolete from Dynamo Core. Using a function marked with this attribute does not automatically issue a warning, so we need a mechanism to detect this and warn us when our code is using such a function, to proactively change it before it gets removed.

Purpose

Add a custom analyzer to detect internal usage of nodes marked with [NodeObsolete]. Follow-up on Dynamo #16709.

Declarations

Check these if you believe they are true

• [ ] The code base is in a better state after this PR
• [ ] Is documented according to the standards
• [ ] The level of testing this PR includes is appropriate
• [ ] User facing strings, if any, are extracted into *.resx files
• [ ] Snapshot of UI changes, if any.

Reviewers

@zeusongit if there already is an analyzer or something similar for this purpose, please let us know how to use it.

FYIs

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