Refactor executable IDs to use strings #262

This commit unifies executable ID structure across categories and
scripts, paving the way for more complex ID solutions for #262.
It also refactors related code to adapt to the changes.

Key changes:

- Change numeric IDs to string IDs for categories
- Use named types for string IDs to improve code clarity
- Add unit tests to verify ID uniqueness

Other supporting changes:

- Separate concerns in entities for data access and executables by using
  separate abstractions (`Identifiable` and `RepositoryEntity`)
- Simplify usage and construction of entities.
- Remove `BaseEntity` for simplicity.
- Move creation of categories/scripts to domain layer
- Refactor CategoryCollection for better validation logic isolation
- Rename some categories to keep the names (used as pseudo-IDs) unique
  on Windows.

tests/unit/domain/Collection/Validation/Rules/EnsurePresenceOfAtLeastOneScript.spec.ts

@@ -0,0 +1,39 @@
+import { describe, it, expect } from 'vitest';
+import { CategoryCollectionValidationContextStub } from '@tests/unit/shared/Stubs/CategoryCollectionValidationContextStub';
+import type { Script } from '@/domain/Executables/Script/Script';
+import { ensurePresenceOfAtLeastOneScript } from '@/domain/Collection/Validation/Rules/EnsurePresenceOfAtLeastOneScript';
+import { ScriptStub } from '@tests/unit/shared/Stubs/ScriptStub';
+
+describe('ensurePresenceOfAtLeastOneScript', () => {
+  it('throws an error when no scripts are present', () => {
+    // arrange
+    const expectedErrorMessage = 'Collection must have at least one script';
+    const scripts: Script[] = [];
+
+    // act
+    const act = () => test(scripts);
+
+    // assert
+    expect(act).to.throw(expectedErrorMessage);
+  });
+
+  it('does not throw an error when at least one category is present', () => {
+    // arrange
+    const scripts: Script[] = [
+      new ScriptStub('existing-script'),
+    ];
+
+    // act
+    const act = () => test(scripts);
+
+    // assert
+    expect(act).not.to.throw();
+  });
+});
+
+function test(allScripts: readonly Script[]):
+ReturnType<typeof ensurePresenceOfAtLeastOneScript> {
+  const context = new CategoryCollectionValidationContextStub()
+    .withAllScripts(allScripts);
+  return ensurePresenceOfAtLeastOneScript(context);
+}