docs: add source file links to readme (#239)

Author: stainless-app[bot]

README.md

@@ -153,7 +153,7 @@ The asynchronous client supports the same options as the synchronous one, except
 
 The SDK throws custom unchecked exception types:
 
-- `OnebusawaySdkServiceException`: Base class for HTTP errors. See this table for which exception subclass is thrown for each HTTP status code:
+- [`OnebusawaySdkServiceException`](onebusaway-sdk-kotlin-core/src/main/kotlin/org/onebusaway/errors/OnebusawaySdkServiceException.kt): Base class for HTTP errors. See this table for which exception subclass is thrown for each HTTP status code:
 
   | Status | Exception                       |
   | ------ | ------------------------------- |
@@ -166,11 +166,11 @@ The SDK throws custom unchecked exception types:
   | 5xx    | `InternalServerException`       |
   | others | `UnexpectedStatusCodeException` |
 
-- `OnebusawaySdkIoException`: I/O networking errors.
+- [`OnebusawaySdkIoException`](onebusaway-sdk-kotlin-core/src/main/kotlin/org/onebusaway/errors/OnebusawaySdkIoException.kt): I/O networking errors.
 
-- `OnebusawaySdkInvalidDataException`: Failure to interpret successfully parsed data. For example, when accessing a property that's supposed to be required, but the API unexpectedly omitted it from the response.
+- [`OnebusawaySdkInvalidDataException`](onebusaway-sdk-kotlin-core/src/main/kotlin/org/onebusaway/errors/OnebusawaySdkInvalidDataException.kt): Failure to interpret successfully parsed data. For example, when accessing a property that's supposed to be required, but the API unexpectedly omitted it from the response.
 
-- `OnebusawaySdkException`: Base class for all exceptions. Most errors will result in one of the previously mentioned ones, but completely generic errors may be thrown using the base class.
+- [`OnebusawaySdkException`](onebusaway-sdk-kotlin-core/src/main/kotlin/org/onebusaway/errors/OnebusawaySdkException.kt): Base class for all exceptions. Most errors will result in one of the previously mentioned ones, but completely generic errors may be thrown using the base class.
 
 ## Logging
 
@@ -285,7 +285,7 @@ val params: CurrentTimeRetrieveParams = CurrentTimeRetrieveParams.builder()
 
 These can be accessed on the built object later using the `_additionalHeaders()`, `_additionalQueryParams()`, and `_additionalBodyProperties()` methods. You can also set undocumented parameters on nested headers, query params, or body classes using the `putAdditionalProperty` method. These properties can be accessed on the built object later using the `_additionalProperties()` method.
 
-To set a documented parameter or property to an undocumented or not yet supported _value_, pass a `JsonValue` object to its setter:
+To set a documented parameter or property to an undocumented or not yet supported _value_, pass a [`JsonValue`](onebusaway-sdk-kotlin-core/src/main/kotlin/org/onebusaway/core/JsonValue.kt) object to its setter:
 
 ```kotlin
 import org.onebusaway.models.CurrentTimeRetrieveParams
@@ -340,7 +340,7 @@ if (field.isMissing()) {
 
 In rare cases, the API may return a response that doesn't match the expected type. For example, the SDK may expect a property to contain a `String`, but the API could return something else.
 
-By default, the SDK will not throw an exception in this case. It will throw `OnebusawaySdkInvalidDataException` only if you directly access the property.
+By default, the SDK will not throw an exception in this case. It will throw [`OnebusawaySdkInvalidDataException`](onebusaway-sdk-kotlin-core/src/main/kotlin/org/onebusaway/errors/OnebusawaySdkInvalidDataException.kt) only if you directly access the property.
 
 If you would prefer to check that the response is completely well-typed upfront, then either call `validate()`: