Build base OpenCV reference library

[fxwllms1]

Create a foundational set of reference scripts and notes for OpenCV to support future development. This task is for documentation and code samples only—no testing or integration required at this stage.

Content to include:

• Basic syntax and code structure

• Common operations (e.g., image loading, drawing, filtering)

• Frequently used tools and utilities within OpenCV

This resource will serve as a quick-start guide for new contributors working on computer vision tasks in the future