Add specifications and Ingest

[keiranjprice101]

closes #5

TODO:

• [x] Handle files not being found. Currently the application will simply exit on exception.
• [x] Improve e2e test - Current version passes, opened an issue to expand these to stop this PR growing into a monster #31
• [x] Check test coverage
• [x] Decide how to handle empty specifications
• [x] Decide whether or not to include the script used to generate the initial specs
• [x] Fix action (failing because pattern matching is not included in action python version) (upgrade actions to 3.10)
• [x] Explain why swap to black. (Pattern matching not supported in yapf and issue is open for over 1 year)