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.

src/domain/Collection/Validation/Rules/EnsurePresenceOfAtLeastOneCategory.ts

@@ -0,0 +1,9 @@
+import type { CategoryCollectionValidator } from '../CategoryCollectionValidator';
+
+export const ensurePresenceOfAtLeastOneCategory: CategoryCollectionValidator = (
+  context,
+) => {
+  if (!context.allCategories.length) {
+    throw new Error('Collection must have at least one category');
+  }
+};