docs: add quadcopter to embodiment schema enum table

[DsThakurRawat]

Description

docs/embodiment_schema.md line 25 lists the embodiment enum but omits quadcopter. Added quadcopter to the enum list in the documentation table to keep it synchronized with schema.json.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Infrastructure / CI update

How Has This Been Tested?

• pytest tests/ passes locally
• reflex doctor sanity check
• Other (please specify): Documentation verification only

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• 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 added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have kept the PR scoped to a single concern (one concern per PR)

[rylinjames]

Approved. The docs/embodiment_schema.md enum table at line 25 needs the quadcopter row now that #132 made it a shipped preset. Note: line 3 ('Three presets ship') is also stale and will be cleaned up alongside #117's preset-creation instructions in a follow-up.