task support

spec/datatypes.md

@@ -162,4 +162,18 @@ enum LanguageType {
     LanguageType_CPP,
     LanguageType_C
 };
+```
+
+## TaskConfig
+```c++
+struct TaskConfig {
+    /// Name of the task, can have spaces unlike task_id
+    string task_name;
+
+    /// ID used when invoking the task, ex: ```ninja task:helloworld```
+    string task_id;
+
+    /// Shell script to be executed when this task is called
+    string shell_script;
+};
 ```

spec/functions.md

@@ -80,4 +80,7 @@ Generate a compiler flag to define a variable
 Get the given extension for a library file on the current platform
 
 ## [X] grbc_bake_package_config(config: PackageConfig) -> Package
-Convert a PackageConfig into a Package
+Convert a PackageConfig into a Package
+
+## [X] grbc_task(config: TaskConfig) -> Void
+Create a task and add it to the build script