library/axi_hsci: Add HSCI IP core

[FilipG24]

PR Description

This PR introduces support for the axi_hsci IP core, which is required in AD9084 based designs.
The HSCI interface is used both as a control interface and to load firmware into the AD9084 device.

PR Type

• Bug fix (change that fixes an issue)
• New feature (change that adds new functionality)
• Breaking change (has dependencies in other repos or will cause CI to fail)
• Documentation

PR Checklist

• I have followed the code style guidelines
• I have performed a self-review of changes
• I have compiled all hdl projects and libraries affected by this PR
• I have tested in hardware affected projects, at least on relevant boards
• I have commented my code, at least hard-to-understand parts
• I have signed off all commits from this PR
• I have updated the documentation (wiki pages, ReadMe files, Copyright etc)
• I have not introduced new Warnings/Critical Warnings on compilation
• I have added new hdl testbenches or updated existing ones

[CLAassistant]

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[bluncan]

Looks good