docs: Add example YAML files

- examples/custom.yaml: Custom YAML format example
- examples/postman.yaml: Postman Collection v2.1 example
- examples/openapi.yaml: OpenAPI 3.0 example

examples/custom.yaml

@@ -0,0 +1,48 @@
+name: "Test Authorization"
+base_url: http://localhost:8080
+variables:
+  email: test@example.com
+  password: Test123!
+
+steps:
+  - name: "Register User"
+    request:
+      method: POST
+      url: /api/register
+      headers:
+        Content-Type: application/json
+      body:
+        email: "{{email}}"
+        password: "{{password}}"
+    extract:
+      - name: user_id
+        json_path: "$.id"
+    assert:
+      - type: status
+        value: 201
+
+  - name: "Login"
+    request:
+      method: POST
+      url: /api/login
+      headers:
+        Content-Type: application/json
+      body:
+        email: "{{email}}"
+        password: "{{password}}"
+    extract:
+      - name: token
+        json_path: "$.token"
+    assert:
+      - type: status
+        value: 200
+
+  - name: "Get Profile"
+    request:
+      method: GET
+      url: /api/profile
+      headers:
+        Authorization: "Bearer {{token}}"
+    assert:
+      - type: status
+        value: 200