chore: enclose everything in namespace matar

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

src/memory.cc

@@ -8,6 +8,7 @@
 
 using namespace logger;
 
+namespace matar {
 Memory::Memory(std::array<uint8_t, BIOS_SIZE>&& bios,
                std::vector<uint8_t>&& rom)
   : bios(std::move(bios))
@@ -232,3 +233,4 @@ Memory::parse_header() {
 
     // multiboot not required right now
 }
+}