New doc for console log formatter APIs

[maryamariyan]

Summary

@shirhatti @Rick-Anderson
As the first draft could you please help me check:

• which items are over explained and if there is anything I missed that needs to be covered?
• next if the order of issues discussed are good?
• If the samples need to fundamentally change?

Next please let me know if I need to use other ways to share source code, perhaps:

• use link to gist instead?

Then we can go through the proper wording and I will fixup the wordings once the big issues are addressed.

Fixes dotnet/AspNetCore.Docs#19224

PS edit by @Rick-Anderson
Internal review URL

[Rick-Anderson]

@maryamariyan this looks fantastic

@IEvangelist would it be possible for you to:

• create a new branch off this that merges into this branch. Alternatively, create a new branch that brings these commits over and merges into master.
• migrate code in snippets
• replace all occurrences of simple with basic (per style guide) - Edit: arg, looks like you can't, it's unfortunately baked into the API. MT is going to be a challenge, might need to exclude simple.
• Add this to the TOC
• Obviously apply style guide, eg, the above, to the preceding

@maryamariyan has done all the hard work, it just needs some editorial polish.

[IEvangelist]

@maryamariyan Maryam Ariyan FTE this looks fantastic

@IEvangelist David Pine FTE would it be possible for you to:

• create a new branch off this that merges into this branch. Alternatively, create a new branch that brings these commits over and merges into master.
• migrate code in snippets
• replace all occurrences of simple with basic (per style guide) - Edit: arg, looks like you can't, it's unfortunately baked into the API. MT is going to be a challenge, might need to exclude simple.
• Add this to the TOC
• Obviously apply style guide, eg, the above, to the preceding

@maryamariyan Maryam Ariyan FTE has done all the hard work, it just needs some editorial polish.

I'll take it from here, thanks!