refactor: extract all generators into independent TOOLS/ modules

Each generator is now a standalone Go module with its own go.mod:

TOOLS/
├── yaml-generator/       ← service_spec_gen (API → YAML)
├── resource-generator/   ← gen_v2 (YAML → Go resources)
├── docs-generator/       ← docs_template_gen_v2 (YAML → Markdown)
├── ops-generator/        ← ops_docs_gen (ops documentation)
└── bin/                  ← pre-built binaries

All scripts updated to use TOOLS/bin/* binaries.
Removed old universal_rebuild/tools/ and universal_rebuild/bin/.

TOOLS/resource-generator/main.go

@@ -0,0 +1,64 @@
+// generate_resources_v2 — главный генератор Terraform-провайдера Nubes.
+//
+// ⛔ ПОДЧИНЯЕТСЯ devops/ARCHITECTURE.md — все правила генерации прописаны там.
+//
+// Пайплайн: YAML-спеки сервисов → Go-ресурсы + registry.go.
+//
+// На вход: resources_yaml/*.yaml (сгенерированы service_spec_gen из API).
+// На выход: internal/resources_gen/*.go (CRUD-ресурсы, subresource'ы, registry).
+//
+// Три вида ресурсов:
+//   - instance    → nubes_{service}              (основной CRUD инстанса)
+//   - subresource → nubes_{service}_{sub}         (пользователи, базы, ...)
+//   - action      → ТОЛЬКО redeploy встроен как git_revision.
+//                    restart/recovery/reconcile исключены (ARCHITECTURE.md).
+
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"resource-generator/loader"
+	"resource-generator/writers"
+)
+
+func main() {
+	root, err := os.Getwd()
+	if err != nil {
+		panic(err)
+	}
+	resourcesDir := strings.TrimSpace(os.Getenv("NUBES_RESOURCES_DIR"))
+	if resourcesDir == "" {
+		resourcesDir = filepath.Join(root, "resources_yaml")
+	}
+	outDir := strings.TrimSpace(os.Getenv("NUBES_RESOURCES_GEN_DIR"))
+	if outDir == "" {
+		outDir = filepath.Join(root, "internal", "resources_gen")
+	}
+
+	instanceResources, subresources, actions, err := loader.LoadSpecs(resourcesDir)
+	if err != nil {
+		panic(err)
+	}
+
+	for _, svc := range instanceResources {
+		if err := writers.WriteInstanceResource(outDir, svc); err != nil {
+			panic(err)
+		}
+	}
+	for _, sr := range subresources {
+		if err := writers.WriteSubresource(outDir, sr); err != nil {
+			panic(err)
+		}
+	}
+	for _, act := range actions {
+		if err := writers.WriteActionResource(outDir, act); err != nil {
+			panic(err)
+		}
+	}
+	if err := writers.WriteRegistry(outDir, instanceResources, subresources, actions); err != nil {
+		panic(err)
+	}
+}