hls4ml Optimization API [Part 2]

Created by: bo3z

Description

• Second part of hls4ml Optimization API #768
• Introduces Dense Unrolled layers, optimising multiplications with zero in Resource strategy with RF > 1
• Introduces additional TCL scripts, to optimise zero BRAM blocks.

Type of change

• New feature (non-breaking change which adds functionality)
• A new research paper code implementation
• Fix issue #798

Tests

• Added a new test, test_dense_unrolled that verifies dense resource layers implement avoiding zero multiplications are correct
• Comparison with "standard" Dense Resource will be shortly available in the (updated) PR #768.

Checklist

• I have read the guidelines for contributing.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have installed and run pre-commit on the files I edited or added.
• I have added tests that prove my fix is effective or that my feature works.