feat(docs): add setup method documentation

src/content/docs/code-snippets/ios/ADJConfig/_configWithAppToken.mdx

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+<Tabs>
+<Tab sync="swift">
+
+### Swift
+
+```swift {3-5}
+let yourAppToken = "{YourAppToken}"
+let environment = ADJEnvironmentSandbox as? String
+let adjustConfig = ADJConfig(
+   appToken: yourAppToken,
+   environment: environment)
+```
+
+</Tab>
+<Tab sync="objc">
+
+### Objective-C
+
+```objective-c {3-4}
+NSString *yourAppToken = @"{YourAppToken}";
+NSString *environment = ADJEnvironmentSandbox;
+*adjustConfig = [ADJConfig configWithAppToken:yourAppToken
+                                  environment:environment];
+```
+
+</Tab>
+<Tab sync="js">
+
+### Javascript
+
+```javascript {4}
+setupWebViewJavascriptBridge(function(bridge) {
+   var yourAppToken = yourAppToken;
+   var environment = AdjustConfig.EnvironmentSandbox;
+   var adjustConfig = new AdjustConfig(yourAppToken, environment);
+});
+```
+
+</Tab>
+</Tabs>

src/content/docs/code-snippets/ios/ADJConfig/_setAllowAdServicesInfoReading.mdx

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+<Tabs>
+<Tab sync="swift">
+
+### Swift
+
+```swift {6}
+let yourAppToken = "{YourAppToken}"
+let environment = ADJEnvironmentSandbox as? String
+let adjustConfig = ADJConfig(
+   appToken: yourAppToken,
+   environment: environment)
+adjustConfig?.allowAdServicesInfoReading = true;
+//...
+Adjust.appDidLaunch(adjustConfig)
+```
+
+</Tab>
+<Tab sync="objc">
+
+### Objective-C
+
+```objc {3}
+*adjustConfig = [ADJConfig configWithAppToken:@"{YourAppToken}"
+                                 environment:ADJEnvironmentSandbox];
+[adjustConfig.setAllowAdServicesInfoReading:YES];
+//...
+[Adjust appDidLaunch:adjustConfig];
+```
+
+</Tab>
+</Tabs>

src/content/docs/code-snippets/ios/ADJConfig/_setAllowIdfaReading.mdx

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+<Tabs>
+<Tab sync="swift">
+
+### Swift
+
+```swift {6}
+let yourAppToken = "{YourAppToken}"
+let environment = ADJEnvironmentSandbox as? String
+let adjustConfig = ADJConfig(
+   appToken: yourAppToken,
+   environment: environment)
+adjustConfig?.allowIdfaReading = true;
+//...
+Adjust.appDidLaunch(adjustConfig)
+```
+
+</Tab>
+<Tab sync="objc">
+
+### Objective-C
+
+```objc {3}
+*adjustConfig = [ADJConfig configWithAppToken:@"{YourAppToken}"
+                                 environment:ADJEnvironmentSandbox];
+[adjustConfig.setAllowIdfaReading:YES];
+//...
+[Adjust appDidLaunch:adjustConfig];
+```
+
+</Tab>
+</Tabs>

src/content/docs/code-snippets/ios/ADJConfig/_setNeedsCost.mdx

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+<Tabs>
+<Tab sync="swift">
+
+### Swift
+
+```swift {7}
+let yourAppToken = "{YourAppToken}"
+let environment = ADJEnvironmentSandbox as? String
+let adjustConfig = ADJConfig(
+   appToken: yourAppToken,
+   environment: environment)
+// ...
+adjustConfig?.needsCost = true
+```
+
+</Tab>
+<Tab sync="objc">
+
+### Objective-C
+
+```objc {6}
+NSString *yourAppToken = @"{YourAppToken}";
+NSString *environment = ADJEnvironmentSandbox;
+*adjustConfig = [ADJConfig configWithAppToken:yourAppToken
+                                 environment:environment];
+// ...
+[adjustConfig setNeedsCost:YES];
+```
+
+</Tab>
+<Tab sync="js">
+
+### Javascript
+
+```js {5}
+setupWebViewJavascriptBridge(function(bridge) {
+   var yourAppToken = yourAppToken;
+   var environment = AdjustConfig.EnvironmentSandbox;
+   var adjustConfig = new AdjustConfig(yourAppToken, environment);
+   adjustConfig.setNeedsCost(true);
+});
+```
+
+</Tab>
+</Tabs>

src/content/docs/en/sdk/ios/reference/adjconfig/index.mdx

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+---
+title: ADJConfig class
+description: Use the methods in this class to set up the Adjust SDK.
+category-title: ADJConfig class
+slug: en/sdk/ios/reference/adjconfig
+---
+
+Use the methods in this class to set up the Adjust SDK.
+
+
+<Callout type="important">
+
+The methods in this class must be called **before** you initialize the SDK.
+
+</Callout>
+
+<Function
+  lang="objc"
+  name="configWithAppToken"
+  link="https://github.com/adjust/ios_sdk/blob/20c2666082c372f9f2c0adf871d8cef195d011f7/Adjust/ADJConfig.h#L253-L254"
+>
+
+Initialize the configuration object with your Adjust app token.
+
+<slot slot="snippet">
+
+import ConfigWithAppToken from "@ios-fragments/ADJConfig/_configWithAppToken.mdx"
+
+<ConfigWithAppToken />
+
+</slot>
+
+<slot slot="parameters">
+
+`appToken` (NSString)
+: Your Adjust app token.
+
+`environment` (NSString)
+: The environment your app is running in.
+
+`allowSuppressLogLevel` (BOOL)
+: Whether to allow all logging to be suppressed.
+
+</slot>
+
+<slot slot="returns">
+
+`config` (ADJConfig)
+: A config object initialized with the provided params.
+
+</slot>
+
+</Function>