Implement enough process handling logic to make psyq4.0 happy (#46)

* Implement enough process handling logic to make psyq4.0 happy

* revert gitignore

* data type update

* PR review

* DEBUG_LOG mistake

---------

Co-authored-by: ConorBobbleHat <c.github@firstpartners.net>

processes.h

@@ -0,0 +1,12 @@
+#include <cstdint>
+#include <sched.h>
+
+namespace processes {
+    struct Process {
+        pid_t pid;
+        uint32_t exitCode;
+    };
+
+    void *allocProcessHandle(pid_t pid);
+    Process* processFromHandle(void* hHandle, bool pop);
+}