feat: добавить ручной runtime-клиент

- добавлен корневой runtime export HttpClient и createApiClient
- настроена сборка JS и d.ts для публичного API пакета
- добавлен тест ручной сборки operations через createApiClient
- добавлена документация по ручному клиенту без OpenAPI
- версия пакета поднята до 5.1.0

package.json

@@ -1,8 +1,17 @@
 {
   "name": "@gromlab/api-codegen",
-  "version": "5.0.1",
-  "description": "CLI tool to generate TypeScript API client from OpenAPI specification",
+  "version": "5.1.0",
+  "description": "CLI tool to generate TypeScript API client from OpenAPI specification and runtime HTTP client for manual APIs",
   "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    },
+    "./package.json": "./package.json"
+  },
   "bin": {
     "api-codegen": "dist/cli.js"
   },
@@ -17,7 +26,7 @@
     "node": ">=18"
   },
   "scripts": {
-    "build": "bun build src/cli.ts --target=node --outdir=dist --format=esm --external=@biomejs/* && cp -r src/templates dist/",
+    "build": "bun build src/cli.ts --target=node --outdir=dist --format=esm --external=@biomejs/* && bun build src/index.ts --target=node --outfile=dist/index.js --format=esm && tsc -p tsconfig.build.json && cp -r src/templates dist/",
     "dev": "bun run src/cli.ts",
     "test": "bun test",
     "test:unit": "bun test tests/unit",
@@ -43,7 +52,8 @@
     "@types/tmp": "^0.2.6",
     "execa": "^8.0.0",
     "msw": "^2.0.0",
-    "tmp": "^0.2.1"
+    "tmp": "^0.2.1",
+    "typescript": "^5"
   },
   "peerDependencies": {
     "typescript": "^5"