Fix optional import crash and error

[CyanideByte]

Describe the changes you have made:

• Fixed a crash by converting a missed import cv2 in display.py to lazy_import.
• Removed the single quotes around pip install open-interpreter[os].

Reference any relevant issues (e.g. "Fixes #000"):

• ModuleNotFoundError: No module named 'cv2'
• ERROR: Invalid requirement: "'open-interpreter[os]'"

Pre-Submission Checklist (optional but appreciated):

• [x] I have included relevant documentation updates (stored in /docs)
• [x] I have read docs/CONTRIBUTING.md
• [x] I have read docs/ROADMAP.md

OS Tests (optional but appreciated):

• [x] Tested on Windows
• [ ] Tested on MacOS
• [ ] Tested on Linux