Feature/7 8 schemas and json

[kjczarne]

List all Issues this Pull Request is meant to solve:

• [x] Resolves #7

Run through our contribution checklist:

• [x] Have you read kalash/doc/contributing.md?
• [x] ~Have you added tests for the implemented feature/fixed bug?~ N/A
• [x] Have you ran a full test suite (nox -e test)?
• [x] Have you checked if the test coverage is at least 85%? -> coverage issue is still open (#4)
• [x] Have you ran code style check (flake8)?
• [x] Have you documented the change?
• [x] Have you updated CHANGELOG.md?

Describe shortly the changes you have introduced:

• I've added a JSON schema autogenerated from our data model using dataclasses-jsonschema Python package. This validates both JSON and YAML files.
• I've documented the change in basic_usage.md so that casual users can leverage this functionality with minimal setup. Docs contain a description on how to set up schemes in VSCode.

Add additional comments (if any): N/A

[codecov-commenter]

Codecov Report

Merging #11 (fb4d057) into develop (cc562f3) will increase coverage by 0.05%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop      #11      +/-   ##
===========================================
+ Coverage    76.08%   76.14%   +0.05%     
===========================================
  Files           14       14              
  Lines          803      805       +2     
===========================================
+ Hits           611      613       +2     
  Misses         192      192              

Impacted Files	Coverage Δ
kalash/last_result_filter.py	26.19% <ø> (ø)
kalash/config.py	92.12% <100.00%> (+0.09%)	:arrow_up:

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