Added test on tc clasiffier, added pinned maps, and obtaining the fd from other maps in order to synchronize between programs

.vscode/settings.json

@@ -23,6 +23,8 @@
         "ring_buffer.h": "c",
         "bpf_helpers.h": "c",
         "tcp_helper.h": "c",
-        "headervmlinux.h": "c"
+        "headervmlinux.h": "c",
+        "bpf_endian.h": "c",
+        "bpf_core_read.h": "c"
     }
 }