docs: add get fields by app section

src/docs/version_002/resources/fields/get_fields_by_app/copy.md

@@ -1 +1,7 @@
 # Get Fields by App {% #get-fields-by-app %}
+
+This endpoint returns a [paged](#pagination) collection of [fields](#fields) for the given app.
+
+## Query Parameters
+
+**Note:** [Pagination](#pagination) query parameters can be used to control the number of fields returned in the response.

src/docs/version_002/resources/fields/get_fields_by_app/example.md

@@ -1 +1,102 @@
 # Retrieve all fields for an app
+
+{% code method="GET" heading="/Fields/appId/{appId}" defaultLanguage="bash" %}
+
+```bash
+curl --location 'https://api.onspring.com/Fields/appId/195' \
+--header 'X-ApiKey: 000000ffffff000000ffffff/00000000-ffff-0000-ffff-000000000000'
+```
+
+```csharp
+using Onspring.API.SDK;
+
+var onspringClient = new OnspringClient(
+  config.BaseUrl,
+  config.ApiKey
+);
+
+var getFieldsResponse = await onspringClient.GetFieldsForAppAsync(195);
+foreach (Field field in getFieldsResponse.Value.Items)
+{
+  Console.WriteLine($"{field.Id}, {field.AppId}, {field.Name}, {field.Type}, {field.Status}, {field.IsRequired}, {field.IsUnique}");
+}
+```
+
+```javascript
+import { OnspringClient } from 'onspring-api-sdk';
+import dotenv from 'dotenv';
+dotenv.config();
+
+const client = new OnspringClient(
+  process.env.BASE_URL,
+  process.env.API_KEY
+);
+
+const res = await client.getFieldsByAppId(195);
+const fields = res.data.items;
+
+for (const field of fields) {
+  console.log(field);
+}
+```
+
+```python
+from OnspringApiSdk.OnspringClient import OnspringClient
+from configparser import ConfigParser
+
+cfg = ConfigParser()
+cfg.read('config.ini')
+
+key = cfg['prod']['key']
+url = cfg['prod']['url']
+
+client = OnspringClient(url, key)
+
+response = client.GetFieldsByAppId(appId=195)
+
+print(f'Status Code: {response.statusCode}')
+print(f'Page Size: {response.data.pageSize}')
+print(f'Page Number: {response.data.pageNumber}')
+print(f'Total Pages: {response.data.totalPages}')
+print(f'Total Records: {response.data.totalRecords}')
+
+for field in response.data.fields:
+  print(f'Field Id: {field.id}')
+```
+
+{% /code %}
+
+{% code heading="RESPONSE" defaultLanguage="json" %}
+
+```json
+{
+  "pageNumber": 1,
+  "pageSize": 2,
+  "totalPages": 1,
+  "totalRecords": 2,
+  "items": [
+    {
+      "id": 6989,
+      "appId": 195,
+      "name": "Attachments",
+      "type": "Attachment",
+      "status": "Enabled",
+      "isRequired": false,
+      "isUnique": false
+    },
+    {
+      "multiplicity": "SingleSelect",
+      "referencedAppId": 2,
+      "id": 6980,
+      "appId": 195,
+      "name": "Created By",
+      "type": "Reference",
+      "status": "Enabled",
+      "isRequired": false,
+      "isUnique": false
+    }
+  ]
+}
+```
+
+{% /code %}