Fix compiler bug with nested optional arguments

This commit fixes compiler bug where it fails when optional values are
compiled into absent values in nested calls.

- Throw exception with more context for easier future debugging.
- Add better validation of argument values for nested calls.
- Refactor `FunctionCallCompiler` for better clarity and modularize it
  to make it more maintainable and testable.
- Refactor related interface to not have `I` prefix, and
  function/variable names for better clarity.

Context:

Discovered this issue while attempting to call
`RunInlineCodeAsTrustedInstaller` which in turn invokes `RunPowerShell`
for issue #246. This led to the realization that despite parameters
flagged as optional, the nested argument compilation didn't support
them.

tests/unit/shared/Stubs/SingleCallCompilerStrategyStub.ts

@@ -0,0 +1,45 @@
+import { CompiledCode } from '@/application/Parser/Script/Compiler/Function/Call/Compiler/CompiledCode';
+import { FunctionCallCompilationContext } from '@/application/Parser/Script/Compiler/Function/Call/Compiler/FunctionCallCompilationContext';
+import { SingleCallCompilerStrategy } from '@/application/Parser/Script/Compiler/Function/Call/Compiler/SingleCall/SingleCallCompilerStrategy';
+import { FunctionCall } from '@/application/Parser/Script/Compiler/Function/Call/FunctionCall';
+import { ISharedFunction } from '@/application/Parser/Script/Compiler/Function/ISharedFunction';
+import { StubWithObservableMethodCalls } from './StubWithObservableMethodCalls';
+import { CompiledCodeStub } from './CompiledCodeStub';
+
+export class SingleCallCompilerStrategyStub
+  extends StubWithObservableMethodCalls<SingleCallCompilerStrategy>
+  implements SingleCallCompilerStrategy {
+  private canCompileResult = true;
+
+  private compiledFunctionResult: CompiledCode[] = [new CompiledCodeStub()];
+
+  public canCompile(func: ISharedFunction): boolean {
+    this.registerMethodCall({
+      methodName: 'canCompile',
+      args: [func],
+    });
+    return this.canCompileResult;
+  }
+
+  public compileFunction(
+    calledFunction: ISharedFunction,
+    callToFunction: FunctionCall,
+    context: FunctionCallCompilationContext,
+  ): CompiledCode[] {
+    this.registerMethodCall({
+      methodName: 'compileFunction',
+      args: [calledFunction, callToFunction, context],
+    });
+    return this.compiledFunctionResult;
+  }
+
+  public withCanCompileResult(canCompileResult: boolean): this {
+    this.canCompileResult = canCompileResult;
+    return this;
+  }
+
+  public withCompiledFunctionResult(compiledFunctionResult: CompiledCode[]): this {
+    this.compiledFunctionResult = compiledFunctionResult;
+    return this;
+  }
+}