feat(spark)!: remove all Icons

[WilliamKelley]

3 of 4

Part of #73. Last five commits are relevant. Reviewable by commit.

1. Project generation (chore(nx): generate new project, spark-icons (@prenda/spark-icons) #132)
2. Copying of icon utility scripts from Mui & Modification for our use case (chore(spark-icons): add icon file builder scripts #133)
3. Removal of icons from @prenda/spark & Specific generation and replacement of depended-on icons (this PR)
4. Addition of all icons in @prenda/spark-icons (feat(spark-icons): add all icons #135)

In this step

Removal and Replacement

All 1700 icon and index files were removed.

Only the icons we use in components/stories were generated and their usage replaced with deep imports -- we probably want to internalize to Spark whatever icons it uses, see #140 for discussion.

[WilliamKelley]

The deep imports are failing, looking into why

Example error msg:

ERROR in ./libs/spark/src/Select.ts
Module not found: Error: Can't resolve '@prenda/spark-icons/ChevronDown' in '/home/william/projects/spark/libs/spark/src'
 @ ./libs/spark/src/Select.ts 1:0-62 5:17-32

Fixed by modifying webpack.config.json, see last commit. Reading through nrwl/nx#2320 and https://webpack.js.org/guides/build-performance/#avoid-extra-optimization-steps helped me come to this fix.

[seigler]

This is really nice. I appreciate you wading into Webpack config to get the imports working!