CLI runtime + CI Tools

[edobrb]

• closes Building a CLI runtime #220
• closes CI tool for model changes check #168

added packages:

• ci-tools (contains the ci tools module + the rest API if served as rest endpoint https://ci-tools.mondrian.com)
• cli-commander (cli runtime, used by cli in order to expose ci-tools)
• cli (the mondrian cli, for now includes two commands coming from ci-tools "graphql-diff", "openapi-diff")

TODOS:

• moves cli.ts inside ci-tools in it's own package cli

[codecov]

Codecov Report

Attention: 58 lines in your changes are missing coverage. Please review.

Comparison is base (9da51ca) 81.02% compared to head (a88f395) 80.88%.
Report is 5 commits behind head on develop.

Files	Patch %	Lines
packages/cli-commander/src/builder.ts	72.25%	13 Missing and 40 partials ⚠️
packages/ci-tools/src/impl/build-oas-report.ts	0.00%	4 Missing ⚠️
packages/ci-tools/src/impl/build-graphql-report.ts	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #236      +/-   ##
===========================================
- Coverage    81.02%   80.88%   -0.14%     
===========================================
  Files          101      103       +2     
  Lines        13525    13721     +196     
  Branches      2208     2252      +44     
===========================================
+ Hits         10958    11098     +140     
- Misses         404      418      +14     
- Partials      2163     2205      +42     

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