docs/learning: Add SDR workshop

[plescaevelyn]

Add comprehensive SDR workshop documentation covering beginner and advanced exercises for Pluto and Jupiter SDR platforms.

Beginner exercises:

• Sinewave loopback (Python and GNU Radio)
• QPSK exercises: FLL, GNU Radio flowgraphs, simple loopback, video
• ASK loopback modulation
• Doppler radar detection
• Spectrum paint transmission

Advanced exercises:

• PSK modulation with EVM measurement
• QPSK Costas loop synchronization
• QPSK symbol synchronization
• MIMO Pluto hardware modification guide
• Text file message transmission

Also includes:

• Hardware setup guides with images for Pluto and Jupiter configurations
• Theoretical content on SDR architecture and building blocks
• Analysis and control evaluation tool documentation (IIO Scope, Scopy, GNU Radio, MATLAB Toolboxes)
• Exercise zip files with GNU Radio flowgraphs and Python examples
• Referencs

Type

• Documentation
• Bug fix
• New feature
• Continuous integration

Checklist

• I have performed a self-review of changes
• I have followed the guidelines:
  • https://analogdevicesinc.github.io/documentation/contributing/docs_guidelines.html
  • https://analogdevicesinc.github.io/doctools/docs_guidelines/index.html
  • https://analogdevicesinc.github.io/documentation/contributing/creating_new_pages.html#documentation-structure
• I have used the appropriate roles and directives:
  • https://analogdevicesinc.github.io/doctools/docs_guidelines/roles.html
  • https://analogdevicesinc.github.io/doctools/docs_guidelines/directives.html
• I ensured that binary data was committed to git lfs:
  • https://analogdevicesinc.github.io/documentation/contributing/creating_new_pages.html#adding-images-and-other-binary-files
• I have built the pages I edited or created, using either make html or adoc serve:
  • https://analogdevicesinc.github.io/doctools/cli.html#serve
• I have signed-off my commits and believe my contribution improves the repository.