guidelines: Workloads (#35)

This change fixes up several issues with the existing workloads document.

1. Corrects a merge conflict which was left in the document from a previous PR.
2. Corrects several spelling mistakes.
3. Adds descriptive alternative text to images for visually impared readers (or jus those using a screen reader)
4. Added an table of contents
   - This replaces the previous text of "[TOC]" which did not actually serve as a table of contents
5. Corrects the formatting of all tables.
   - Adjust column widths
   - Adjust column alignments
   - Correct whitespace for better text wrapping
6. Renames files using all lowercase letters.
   - Standardizes word spacing by replacing a mix of no space, underscore, and camel casing with hyphens.
7. Removes non-standard "{#anchor-name}" tags on all header items.
   - The original text was clearly attempting to provide anchor tags, but actually just ended up corrupting the existing tags.
   example: `### Goal {#goal}` became `#goal-goal` instead of the desired `#goal`.
8. Fixes several markdown errors which were causing minor page layout issues when viewed on github.com.

Author: whoisj