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.cpp

@@ -0,0 +1,24 @@
+#include "processes.h"
+#include "handles.h"
+#include <cassert>
+#include <cstdio>
+
+namespace processes {
+    void *allocProcessHandle(pid_t pid) {
+		auto* process = new Process;
+		process->pid = pid;
+		process->exitCode = 0;
+
+		return handles::allocDataHandle(handles::Data{handles::TYPE_PROCESS, (void*)process, 0});
+	}
+
+	Process* processFromHandle(void *handle, bool pop) {
+		handles::Data data = handles::dataFromHandle(handle, pop);
+		if (data.type == handles::TYPE_PROCESS) {
+			return (Process*)data.ptr;
+		} else {
+			printf("Invalid file handle %p\n", handle);
+			assert(0);
+		}
+	}
+}