projects: ad9083: Add README for AD9083 project

[jvelasc2]

Added the readme document for the AD9083 project.

Also modified the sphinx projects_doc.rst file to add the corresponding source for this new readme.

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)

PR Checklist

• [ ] I have followed the Coding style guidelines
• [ ] I have complied with the Submission Checklist
• [x] I have performed a self-review of the changes
• [ ] I have commented my code, at least hard-to-understand parts
• [ ] I have build all projects affected by the changes in this PR
• [ ] I have tested in hardware affected projects, at the relevant boards
• [x] I have signed off all commits from this PR
• [x] I have updated the documentation (wiki pages, ReadMe etc), if applies

[buha]

i have no idea why it shows conflicts, if I click the "Resolve conflicts" button, i can't find the "<<<<<" marker

[jvelasc2]

Hi @buha , I've found the conflict in the projects sphinx toctree. Already resolved it and updated this commit. Thank you.

• Joyce