Add tracing options

Author: tustanivsky

docs/platforms/unreal/configuration/options.mdx

@@ -85,3 +85,29 @@ This function is called with an SDK-specific message or error event object, and
 By the time <PlatformIdentifier name="before-send" /> is executed, all scope data has already been applied to the event. Further modification of the scope won't have any effect.
 
 </ConfigKey>
+
+## Tracing Options
+
+<ConfigKey name="enable-tracing">
+
+A boolean value, if true, transactions and trace data will be generated and captured. This will set the `traces-sample-rate` to the recommended default of 1.0 if `traces-sample-rate` is not defined. Note that `traces-sample-rate` and `traces-sampler` take precedence over this option.
+
+</ConfigKey>
+
+<ConfigKey name="traces-sample-rate">
+
+A number between 0 and 1, controlling the percentage chance a given transaction will be sent to Sentry. (0 represents 0% while 1 represents 100%.) Applies equally to all transactions created in the app. Either this or <PlatformIdentifier name="traces-sampler" /> must be defined to enable tracing.
+
+</ConfigKey>
+
+<ConfigKey name="traces-sampler">
+
+A function responsible for determining the percentage chance a given transaction will be sent to Sentry. It will automatically be passed information about the transaction and the context in which it's being created, and must return a number between `0` (0% chance of being sent) and `1` (100% chance of being sent). Can also be used for filtering transactions, by returning 0 for those that are unwanted. Either this or <PlatformIdentifier name="traces-sample-rate" /> must be defined to enable tracing.
+
+<Alert level="info">
+
+The Unreal Engine SDK doesn't currently support sampling functions on Windows/Linux (<PlatformIdentifier name="traces-sampler" />).
+
+</Alert>
+
+</ConfigKey>