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.

tests/unit/application/Parser/Executable/Script/Compiler/ParameterNameTestRunner.ts

@@ -0,0 +1,54 @@
+import { describe, it, expect } from 'vitest';
+
+export function testParameterName(action: (parameterName: string) => string) {
+  describe('name', () => {
+    describe('sets as expected', () => {
+      // arrange
+      const expectedValues: readonly string[] = [
+        'lowercase',
+        'onlyLetters',
+        'l3tt3rsW1thNumb3rs',
+      ];
+      for (const expected of expectedValues) {
+        it(expected, () => {
+          // act
+          const value = action(expected);
+          // assert
+          expect(value).to.equal(expected);
+        });
+      }
+    });
+    describe('throws if invalid', () => {
+      // arrange
+      const testScenarios: readonly {
+        readonly description: string;
+        readonly value: string;
+        readonly expectedError: string;
+      }[] = [
+        {
+          description: 'empty Name',
+          value: '',
+          expectedError: 'missing parameter name',
+        },
+        {
+          description: 'has @',
+          value: 'b@d',
+          expectedError: 'parameter name must be alphanumeric but it was "b@d"',
+        },
+        {
+          description: 'has {',
+          value: 'b{a}d',
+          expectedError: 'parameter name must be alphanumeric but it was "b{a}d"',
+        },
+      ];
+      for (const { description, value, expectedError } of testScenarios) {
+        it(description, () => {
+          // act
+          const act = () => action(value);
+          // assert
+          expect(act).to.throw(expectedError);
+        });
+      }
+    });
+  });
+}