feat(docs): support list in pretty markdown to showcase API's better (closes #900)

[emoralesb05]

Since data-tables arent really responsive, we want to be able to showcase a list for our API properties and events. This means our internal pretty markdown module has to support them

For this we are going to use the + list syntax of markdown to replace with a mat-list

e.g.

+ item 1
+ item 2

Also we can use sublists to add more information to a single item leveraging matLine

e.g.

+ line 1
  + subline 1
  + subline 2
+ sline 2

plus added example in chips README.md

What's included?

• Support for lists in pretty markdown component
• Replaces data-table in chips with list

Test Steps

• npm run serve
• Go to chips demo
• See list being rendered

General Tests for Every PR

• npm run serve:prod still works.
• npm run tslint passes.
• npm run stylelint passes.
• npm test passes and code coverage is not lower.
• npm run build:release still works.

Screenshots or link to StackBlitz/Plunker

closes #900