Initial commit

* Bare skeleton implementation of everything
* Testbench builds with Verilator
* Test runs

tb/tb_types.sv

@@ -0,0 +1,13 @@
+// Types
+package tb_types;
+    // Agent type
+    typedef enum {
+        MANAGER,
+        SUBORDINATE
+    } agent_type_t;
+
+    typedef enum {
+        AXI_READ,
+        AXI_WRITE
+    } axi_transaction_type_t;
+endpackage