v1.0

docs: add README, license and Doxygen configuration

- add README with build and test steps, FetchContent integration,
  usage example, host requirements, effect table and screenshots
- add effect screenshots from the Vienna Vulkan Engine in docs/images
- add MIT license
- add Doxyfile, `doxygen` writes the HTML reference to build/doxygen
- ignore .vscode, .DS_Store and all build directories

v0.4: feat: support ordered effect chains with add/remove operations

feat: support ordered effect chains with add/remove operations

• apply effects in a fixed order
• add remove methods for all effects
• retain pipelines and settings when effects are removed

v0.3

new effects: solarize sabattier emboss sobel speedlines highlight segmentation

v0.2

clear image vectors when destroying

v0.1

safer source Access mask and Pipelinestage