Add more and unify tests for absent object cases

- Unify test data for nonexistence of an object/string and collection.
- Introduce more test through adding missing test data to existing tests.
- Improve logic for checking absence of values to match tests.
- Add missing tests for absent value validation.
- Update documentation to include shared test functionality.

src/application/Parser/Script/Compiler/Expressions/Expression/ExpressionEvaluationContext.ts

@@ -13,7 +13,7 @@ export class ExpressionEvaluationContext implements IExpressionEvaluationContext
     public readonly pipelineCompiler: IPipelineCompiler = new PipelineCompiler(),
   ) {
     if (!args) {
-      throw new Error('undefined args, send empty collection instead');
+      throw new Error('missing args, send empty collection instead.');
     }
   }
 }