Rename project from cvffmpeg to framewright

[kmatzen]

Summary

Full project rename: cvffmpeg -> framewright

254 lines changed, 254 lines changed — pure rename, no behavior change.

What changed

• C++ namespace: framewright::VideoReader, framewright::VideoWriter
• Include paths: #include <framewright/VideoReader.h>
• CMake: project(framewright), framewright::framewright, FRAMEWRIGHT_BUILD_*
• Python: import framewright, PyPI name framewright
• All docs, examples, tests, CI config updated

Migration for existing users

// Before
#include <cvffmpeg/VideoReader.h>
cvffmpeg::VideoReader reader;

// After
#include <framewright/VideoReader.h>
framewright::VideoReader reader;

# Before
target_link_libraries(app PRIVATE cvffmpeg::cvffmpeg)

# After
target_link_libraries(app PRIVATE framewright::framewright)

All tests pass (29 passed, 2 skipped).

Test plan

• Build compiles cleanly
• All tests pass
• No remaining "cvffmpeg" references in source
• CI passes

🤖 Generated with Claude Code