add support for v4 CQL

[raleigh-g-thompson]

Initial commit - WIP

fixes #95

[github-actions]

Formatting check succeeded!

[codecov]

Codecov Report

❌ Patch coverage is 79.31727% with 103 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.70%. Comparing base (69738db) to head (e85dc0d).

Files with missing lines	Patch %	Lines
...r/repository/ig/standard/IgStandardRepository.java	85.19%	30 Missing and 11 partials ⚠️
.../repository/ig/standard/IgStandardConventions.java	74.22%	18 Missing and 7 partials ⚠️
.../opencds/cqf/cql/ls/server/command/CqlCommand.java	0.00%	16 Missing ⚠️
...y/ig/standard/IgStandardRepositoryCompartment.java	57.14%	10 Missing and 2 partials ⚠️
...rver/provider/ContentServiceModelInfoProvider.java	0.00%	2 Missing ⚠️
.../server/provider/ContentServiceSourceProvider.java	33.33%	2 Missing ⚠️
...ncds/cqf/cql/ls/server/provider/HoverProvider.java	50.00%	0 Missing and 2 partials ⚠️
...rg/opencds/cqf/cql/ls/core/utility/Converters.java	90.90%	1 Missing ⚠️
.../cql/ls/server/manager/CompilerOptionsManager.java	0.00%	1 Missing ⚠️
...cqf/cql/ls/server/provider/FormattingProvider.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             master      #97       +/-   ##
=============================================
+ Coverage     35.05%   49.70%   +14.65%     
- Complexity      140      268      +128     
=============================================
  Files            40       46        +6     
  Lines          1067     1523      +456     
  Branches        120      181       +61     
=============================================
+ Hits            374      757      +383     
- Misses          650      705       +55     
- Partials         43       61       +18     

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