Improve Harper Application Management with lockfile

[Ethan-Arrowood]

Taking a note from package managers, this PR adds a harper-application-lock.json file for tracking application installation. Now, if an application configuration is unchanged, it won't be reinstalled.

based on #12

[kriszyp]

This looks great!
One thing I am little confused by, we have a script to run integrations tests:
https://github.com/HarperFast/harper/pull/11/files#diff-7ae45ad102eab3b6d7e7896acd08c427a9b25b346470d7bc6507b6481575d519R38
It looks like it is running different integration tests? Those still need to be pulled in and integrated with these tests?

[Ethan-Arrowood]

Yes these are separate integration tests. The existing integration tests are the apiTests/ that run in sequence on their own Harper instance. Those already take so long to execute I didn't want to keep adding to it so I started this new folder. My next step was to merge the integration test workflows so they can all run "together" as part of the CI, but still be independently authored (and can be independently executed locally for faster debugging and iteration).

[Ethan-Arrowood]

Moreover the integrationTests/apiTests/ are not independent. You can't really isolate any one test or test suite and get reliable runs. Some of the files depends on like tables being created from previous test files. I want to avoid more of that as it makes fixing tests really hard because you have to run the entire suite every time.

[cb1kenobi]

LGTM!