feat: add VSO robot class with unitTest

[ninankh]

**Depends on #533 ** — this PR is built on top of that branch and includes its commits. Please review/merge #533 first; this diff will shrink to just the new changes once that's merged and this PR is retargeted to main.

Summary

Adds a new VSO robot class that integrates the device's sensors for
reading. Includes unit tests for the new class and a tutorial with
sample code demonstrating sensor reads.

Changes

• VSO: new robot class integrating sensor reading functionality
• Unit tests added for VSO sensor read methods
• Tutorial added under tutorials/ with sample code demonstrating how to
  read VSO's sensors

Testing

• Added pytest coverage for VSO sensor reading logic
• Ran make test locally, all passing
• Ran make check for lint/format compliance

Checklist

• Tests included for new functionality

[codecov]

Codecov Report

❌ Patch coverage is 97.60718% with 24 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
opensourceleg/robots/vso.py	87.9%	10 Missing and 1 partial ⚠️
opensourceleg/sensors/adc.py	98.3%	8 Missing and 1 partial ⚠️
opensourceleg/actuators/brushed.py	98.4%	2 Missing and 1 partial ⚠️
opensourceleg/sensors/hall.py	98.4%	0 Missing and 1 partial ⚠️

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