Refactor bsconfig documentation

[josephjunker]

The current README feels a little intimidating to me because of how long it is, so this PR pulls some of the details from it out into their own pages.

List of changes:

• Add minimal bsconfig.json example, copied from the brighterscript-template project
• Make a new page for bsconfig documentation
• Make a new page for documentation on suppressing error messages
• Edit "extends" and "optional extends" sections to reduce duplication
• Alphabetize bsconfig documentation
• Add table of contents for bsconfig documentation
• Add cross-links to bsconfig documentation, connecting sections together
• A few tweaks to markdown formatting which do not affect the rendered page, such as adding or removing some extra newlines for consistency
• Remove reference to ignoreErrorCodes flag in "bs ignore" documentation
• Remove self-effacing statement about project being likely to contain bugs in "bs ignore" documentation :)

Other than these changes, the text is solely rearranged from the current version with no modifications. If desired I can undo some of these changes, such as not alphabetizing the documentation.

I've manually tested all of the links within the bsconfig documentation page but the use of absolute hyperlinks prevents me from manually testing the links from the error suppression documentation page to the bsconfig documentation page.

[TwitchBronBron]

This is great. Thanks so much!