feat: add .spec.ts generation for models, mappers, repositories and use-cases

Add 4 new Mustache templates for generating unit test specs:
- model-entity.spec.mustache: tests instantiation, property setting, mock builder
- mapper.spec.mustache: tests per-property DTO→Entity mapping, instanceof, all fields
- api.repository.impl.spec.mustache: tests HTTP method, response mapping, error propagation
- api.use-cases.impl.spec.mustache: tests repository delegation, observable forwarding

Generator changes:
- Add uppercaseHttpMethod to TagOperation for spec HTTP assertions
- Add testValue to TagOperationParam for auto-generated test arguments
- Add resolveTestParamValue utility for primitive/complex type test literals
- Add specs counter to GeneratedCount and GenerationReport
- Wire 4 new renderTemplate calls in schema and tag loops
- Update report generator to count .spec.ts files

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

templates/api.use-cases.impl.spec.mustache

@@ -0,0 +1,91 @@
+{{#apiInfo}}
+{{#apis}}
+{{#operations}}
+import { TestBed } from '@angular/core/testing';
+import { of } from 'rxjs';
+
+import { {{classname}}UseCasesImpl } from './{{classFilename}}.use-cases.impl';
+
+import { {{constantName}}_REPOSITORY, {{classname}}Repository } from '@/domain/repositories/{{classFilename}}.repository.contract';
+{{#returnImports}}
+import { mock{{classname}}Model } from '@/entities/models/{{classFilename}}.model.mock';
+{{/returnImports}}
+
+describe('{{classname}}UseCasesImpl', () => {
+  let useCase: {{classname}}UseCasesImpl;
+  let mockRepository: jasmine.SpyObj<{{classname}}Repository>;
+
+  beforeEach(() => {
+    mockRepository = jasmine.createSpyObj('{{classname}}Repository', [{{#operation}}'{{nickname}}', {{/operation}}]);
+
+    TestBed.configureTestingModule({
+      providers: [
+        {{classname}}UseCasesImpl,
+        { provide: {{constantName}}_REPOSITORY, useValue: mockRepository }
+      ]
+    });
+
+    useCase = TestBed.inject({{classname}}UseCasesImpl);
+  });
+
+  it('should be created', () => {
+    expect(useCase).toBeTruthy();
+  });
+
+{{#operation}}
+  describe('{{nickname}}', () => {
+    it('should delegate to the repository', () => {
+      {{#isListContainer}}
+      mockRepository.{{nickname}}.and.returnValue(of([mock{{returnBaseType}}Model()]));
+      {{/isListContainer}}
+      {{^isListContainer}}
+      {{#returnBaseType}}
+      mockRepository.{{nickname}}.and.returnValue(of(mock{{returnBaseType}}Model()));
+      {{/returnBaseType}}
+      {{^returnBaseType}}
+      mockRepository.{{nickname}}.and.returnValue(of(undefined));
+      {{/returnBaseType}}
+      {{/isListContainer}}
+
+      useCase.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}});
+
+      expect(mockRepository.{{nickname}}).toHaveBeenCalled();
+    });
+
+    it('should return the observable from the repository', (done) => {
+      {{#isListContainer}}
+      const expected = [mock{{returnBaseType}}Model()];
+      mockRepository.{{nickname}}.and.returnValue(of(expected));
+
+      useCase.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe((result) => {
+        expect(result).toEqual(expected);
+        done();
+      });
+      {{/isListContainer}}
+      {{^isListContainer}}
+      {{#returnBaseType}}
+      const expected = mock{{returnBaseType}}Model();
+      mockRepository.{{nickname}}.and.returnValue(of(expected));
+
+      useCase.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe((result) => {
+        expect(result).toEqual(expected);
+        done();
+      });
+      {{/returnBaseType}}
+      {{^returnBaseType}}
+      mockRepository.{{nickname}}.and.returnValue(of(undefined));
+
+      useCase.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe({
+        complete: () => done()
+      });
+      {{/returnBaseType}}
+      {{/isListContainer}}
+    });
+  });
+
+{{/operation}}
+});
+
+{{/operations}}
+{{/apis}}
+{{/apiInfo}}