Add detailed docs

[glytching]

Add detailed docs using either:

• GitHub Pages
• GitHub Wiki

Documentation to include:

• The QL syntax including usages of
  • All operators: =, !=, >, <, >=, <=, in, not in, like, not like, is null, is not null
  • All conjunctions: AND, OR
  • String literals including concatenation
  • Numeric literals including concatenation and arithemtic operators: +, -, *, /
• A cookbook showing example usage covering all features and various types of input

[glytching]

Docs published on the repo's wiki: https://github.com/glytching/tranquil/wiki

This is a solid start, the docs will be added to over time.