Make readmes navigable

[michael-dean-haynie]

There are 4 README.mds: (excluding the examples)

• the root monorepo readme
• the @bitovi/querystring-parser readme
• the @bitovi/objection-querystring-parser readme
• the @bitovi/sequelize-querystring-parser readme

The goal here is to make the readmes clear and easily navigable - so that readers can quickly find what they're looking for.

Acceptance Criteria

• The monorepo readme should have a helpful section near the top that explains what the project is and that the reader may be looking for the other package-specific readmes (with links)
• We should remove the duplicate documentation from the monorepo readme (but still keep the development/contributing stuff)
• The other 3 package readmes should also have a helpful section near the top that explains that this specific package is for and also link back to the monorepo readme
• The ORM package readmes should probably link to the core @bitovi/querystring-parser readme and mention how they are used together