Ch 24 - Add edge detection section (#177)

* Start converting prototype to react

* Finish convolution demo

* Improve UI, refactor code

* Add sobel image processing demo

* Improve sobel ui

* Add gradient initial explanations

* Swap in image processing funcs in convolution demo, improve doc

* Fix grid input bug, generalize grid input ui

* Start gradient demo

* Fix and improve gradient demo

* Add topology demo

* Try to improve mobile support

* Make convolution demo more clear, replace max spread with reduce

* Style changes, fix gradient drawing

* Start suppression demo

* Start pipeline demo

* Add image uplaod and indicator to pipeline demo

* Add movement control, refactor code

* UI and documentation improvements

* Start moving over explanations

* Replace third party media, fix grid input update bug

* Implement remaining edge detection processes

* Tweaking explanations and reworking on convolution demo

* Fix image processing bugs

* Start reworking gradient demo

* Add control UI to gradient demo

* Start replacing 3dcss with threejs in pipeline demo

* Fix material update bug

* Re-implement pipeline demo with three

* Improve pipeline demo code and docs

* Rework suppression demo

* Minor bug fixes, improve suppression demo

* Add threshold section

* Add hysteresis and canny sections

* Split into multiple pages, modify header injection

* Reworking convolution demo

* Reworking convolution topology demos

* Testing sticky footer, add breadcrumbs in injection

* Rewrite explanations

* Rebuild vis with gray colorscale for surface

* Add opacity and boldness changes for gradient vectors

* Combine pillar and ramp diagrams in convolution demo

* Add out of bounds for convolution demo

* Extend 2d pipeline demo

* Add RGB demo

* Add grayscale demo, improve readability

* Minor UI changes

* Start adding webcam

* Clean up pipeline code and add webcam

* Add pattern selection for sobel pipeline

* Improving webcam performance

* Add pixel magnifier, fix image upload bug

* Change sobel colorscale to red-green

* Rehaul text for robust edge detection

* Improving mobile support

* Minor changes to suppression demo

* Separate magnifier component

* Disable nav to section 3, pipeline improvements

* Modularize and lazy load demos

* Minor changes to webcam

* Start condensing convolution demo

* Minor improvements to convolution magnifier, add loading fallback

* Reorganize text and add noise demo

* Add default image reset, minor ui changes

* Try remove modules for mobile

* Fixing touch and sizing for mobile

* Convert grids to canvas

* Fixing mobile bugs

* Fixing touch scrolling bug

* Fixing mobile rendering bug

* Minor ui changes

* Improve convolution demo

* Fix css on topology demo

* Replace RGB demo

* Add blurbs, rewrite grayscale func and rgb section

* Minor style changes

* Remove unused code and assets

* Merge edge detection to one page

* Merge filters in convolution demo

* Add collapsable section, clean up text

* Fix for mobile

* Make requested changes

* Revert global changes

* Fix diff problems

Author: jasmaa