Create folder of manifests that include feature, example and bug cases

[jmcook1186]

Types of changes

• Enhancement (project structure, spelling, grammar, formatting)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

A description of the changes proposed in the Pull Request

This PR reorganizes the existing file structure for manifests from
examples/manifests

to manifests/examples, manifests/bugs and manifests/features.

Some of the older manifests have been removed.

In manifests/features I have added manifests that successfully execute individual features from our standard library.

In manifests/examples I have added manifests that execute pipelines of varying complexity, simulating real use cases

In manifests/bugs I have added manifests that fail for soem specific reason to be used as negative test cases.

Partially addresses #615