Refactor to unify scripts/categories as Executable

This commit consolidates scripts and categories under a unified
'Executable' concept. This simplifies the architecture and improves code
readability.

- Introduce subfolders within `src/domain` to segregate domain elements.
- Update class and interface names by removing the 'I' prefix in
  alignment with new coding standards.
- Replace 'Node' with 'Executable' to clarify usage; reserve 'Node'
  exclusively for the UI's tree component.

src/application/Parser/Executable/CategoryCollectionSpecificUtilities.ts

@@ -0,0 +1,32 @@
+import type { IScriptingDefinition } from '@/domain/IScriptingDefinition';
+import type { FunctionData } from '@/application/collections/';
+import { ScriptCompiler } from './Script/Compiler/ScriptCompiler';
+import { SyntaxFactory } from './Script/Validation/Syntax/SyntaxFactory';
+import type { IScriptCompiler } from './Script/Compiler/IScriptCompiler';
+import type { ILanguageSyntax } from './Script/Validation/Syntax/ILanguageSyntax';
+import type { ISyntaxFactory } from './Script/Validation/Syntax/ISyntaxFactory';
+
+export interface CategoryCollectionSpecificUtilities {
+  readonly compiler: IScriptCompiler;
+  readonly syntax: ILanguageSyntax;
+}
+
+export const createCollectionUtilities: CategoryCollectionSpecificUtilitiesFactory = (
+  functionsData: ReadonlyArray<FunctionData> | undefined,
+  scripting: IScriptingDefinition,
+  syntaxFactory: ISyntaxFactory = new SyntaxFactory(),
+) => {
+  const syntax = syntaxFactory.create(scripting.language);
+  return {
+    compiler: new ScriptCompiler(functionsData ?? [], syntax),
+    syntax,
+  };
+};
+
+export interface CategoryCollectionSpecificUtilitiesFactory {
+  (
+    functionsData: ReadonlyArray<FunctionData> | undefined,
+    scripting: IScriptingDefinition,
+    syntaxFactory?: ISyntaxFactory,
+  ): CategoryCollectionSpecificUtilities;
+}