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.repository.impl.spec.mustache

@@ -0,0 +1,97 @@
+{{#apiInfo}}
+{{#apis}}
+{{#operations}}
+import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
+import { TestBed } from '@angular/core/testing';
+
+import { {{classname}}RepositoryImpl } from './{{classFilename}}.repository.impl';
+{{#returnImports}}
+import { mock{{classname}}Dto } from '@/dtos/{{classFilename}}.dto.mock';
+import { mock{{classname}}Model } from '@/entities/models/{{classFilename}}.model.mock';
+{{/returnImports}}
+
+describe('{{classname}}RepositoryImpl', () => {
+  let repository: {{classname}}RepositoryImpl;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [HttpClientTestingModule],
+      providers: [{{classname}}RepositoryImpl]
+    });
+
+    repository = TestBed.inject({{classname}}RepositoryImpl);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => {
+    httpMock.verify();
+  });
+
+  it('should be created', () => {
+    expect(repository).toBeTruthy();
+  });
+
+{{#operation}}
+  describe('{{nickname}}', () => {
+    it('should perform a {{uppercaseHttpMethod}} request', () => {
+      repository.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe();
+
+      const req = httpMock.expectOne((r) => r.method === '{{uppercaseHttpMethod}}');
+      expect(req.request.method).toBe('{{uppercaseHttpMethod}}');
+      {{#isListContainer}}
+      req.flush({ items: [mock{{returnBaseType}}Dto()] });
+      {{/isListContainer}}
+      {{^isListContainer}}
+      {{#returnType}}
+      req.flush(mock{{returnBaseType}}Dto());
+      {{/returnType}}
+      {{^returnType}}
+      req.flush(null);
+      {{/returnType}}
+      {{/isListContainer}}
+    });
+
+    {{#returnType}}
+    it('should map the response to the domain model', () => {
+      const dto = mock{{returnBaseType}}Dto();
+      const expectedModel = mock{{returnBaseType}}Model();
+
+      {{#isListContainer}}
+      repository.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe((result) => {
+        expect(result).toBeTruthy();
+        expect(result.length).toBeGreaterThan(0);
+      });
+
+      httpMock.expectOne((r) => r.method === '{{uppercaseHttpMethod}}').flush({ items: [dto] });
+      {{/isListContainer}}
+      {{^isListContainer}}
+      repository.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe((result) => {
+        expect(result).toEqual(expectedModel);
+      });
+
+      httpMock.expectOne((r) => r.method === '{{uppercaseHttpMethod}}').flush(dto);
+      {{/isListContainer}}
+    });
+
+    {{/returnType}}
+    it('should propagate HTTP errors', (done) => {
+      repository.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe({
+        error: (err) => {
+          expect(err.status).toBe(500);
+          done();
+        }
+      });
+
+      httpMock
+        .expectOne((r) => r.method === '{{uppercaseHttpMethod}}')
+        .flush('Internal Server Error', { status: 500, statusText: 'Internal Server Error' });
+    });
+  });
+
+{{/operation}}
+});
+
+{{/operations}}
+{{/apis}}
+{{/apiInfo}}