Expose relevant interfaces from root exports; update docs

[mgramigna]

Summary

Can now export any interface directly from fqm-execution. Updated docs, and deprecated the previous type exports to be removed as a breaking change in 2.0.

Before:

// These contain every interface/type exported in the corresponding files
import { CalculatorTypes, Enums, CQLTypes, ELMTypes } from 'fqm-execution';

After:

// Only import specific types that you are using/need to use
import { CalculationOptions, PopulationType, MeasureScoreType, FinalResult, Relevance, /* ... */ } from 'fqm-execution';

New behavior

None in runtime. Any previously export interface can now be imported directly from fqm-execution in a TypeScript project

Code changes

• Add individual type file exports to src/index.ts and add deprecation comments/todo
• Update docs

Testing guidance

npm link the project somewhere and try the new import style for the interfaces. Make sure the old style still works too.

[github-actions[bot]]

Coverage report

St.:grey_question:	Category	Percentage	Covered / Total
🟢	Statements	85.85% (+0.02% 🔼)	2051/2389
🟡	Branches	74.45%	1830/2458
🟢	Functions	88.05%	361/410
🟢	Lines	86.16% (+0.02% 🔼)	1980/2298

Test suite run success

383 tests passing in 29 suites.

Report generated by 🧪jest coverage report action from 29bc3d7b2f0f323e91b007744954aa938b4aa01d