Kernel: Add support for text mode terminal

This probably won't be used at all but it was so simple and made me do
really nice refactorings so i decided to add it :)

kernel/CMakeLists.txt

@@ -90,6 +90,7 @@ set(KERNEL_SOURCES
 	kernel/Terminal/PseudoTerminal.cpp
 	kernel/Terminal/Serial.cpp
 	kernel/Terminal/TerminalDriver.cpp
+	kernel/Terminal/TextModeTerminal.cpp
 	kernel/Terminal/TTY.cpp
 	kernel/Terminal/VirtualTTY.cpp
 	kernel/Thread.cpp