feat: added documentation for clientcallbacks

docs/legacy/Client/functions/registerclientcallback.md

@@ -0,0 +1,29 @@
+# RegisterClientCallback
+
+```lua
+ESX.RegisterClientCallback(name, handler)
+```
+
+This function registers a client callback, which is used for sending Client Data, to the Server.
+
+## Arguments
+
+| Argument | Data Type | Optional | Default Value | Explaination                                                                                                      |
+| -------- | --------- | -------- | ------------- | ---------------------------------------------------------------------------------------------------------------- |
+| name     | string    | No       | -             | Client callback name                                                                                             |
+| cb       | function  | No       | -             | Callback function, which contains an varied size of arguments depending on how many arguments parsed from client |
+| ...args  | any       | No       | -             | The args provided after the handler on the client TriggerClientCallback                                          |
+
+## Example
+
+```lua
+local myVariable = 'hello'
+
+ESX.RegisterClientCallback('esx_example:test', function(cb, myArgument)
+  print(myArgument)
+  print('this code is an asynchronous task')
+  cb(myVariable)
+end)
+
+print('this code is running in sync')
+```

docs/legacy/Server/Functions/triggerclientcallback.md

@@ -0,0 +1,29 @@
+# TriggerClientCallback
+
+```lua
+ESX.TriggerClientCallback(name, source, cb, ...args)
+```
+
+This function triggers a client callback. See [ESX.RegisterClientCallback](./../../client/functions/registerclientcallback) on registering client callbacks.
+
+## Arguments
+
+| Argument | Data Type | Optional | Default Value | Explaination                                                                                                                                                         |
+| -------- | --------- | -------- | ------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| name     | string    | No       | -             | A valid client callback name                                                                                                                                        |
+| source   | number    | No       | -             | The source of the player to trigger the callback on                                                                                                                  |
+| cb       | function  | No       | -             | The returned function when the async task has completed. The invoked function a varied size of arguments depending on how many arguments are parsed from the client |
+| args     | any       | Yes      | -             | Any arguments to parse to the async function                                                                                                                        |
+
+## Example
+
+```lua
+local myArgument = 'hello'
+
+ESX.TriggerClientCallback('esx_example:test', source, function(isBusy, numKills)
+  print(isBusy, numKills)
+  print('this code is an asynchronous task')
+end, myArgument)
+
+print('this code is running in sync')
+```