Fix CorsixTH savegame functionality by fixing the keyboard letterpicker input

[RkShaRkz]

This PR focuses on fixing the CorsixTH saving function by enabling keyboard input to enter the file's name.

It first unzips the corsixth.zip to a CorsixTH folder, fixes the launch script to allow text input, rezips the folder and finally gets rid of the working folder.

Script changes:

BEFORE

cd $GAMEDIR

$ESUDO chmod 666 /dev/tty1
$ESUDO chmod 666 /dev/uinput
$GPTOKEYB "corsix-th" -c "$GPTOKEYB_CONFIG" &

AFTER

export TEXTINPUTINTERACTIVE="Y"
export TEXTINPUTNOAUTOCAPITALS="Y"
cd $GAMEDIR

$ESUDO chmod 666 /dev/tty1
$ESUDO chmod 666 /dev/uinput
$GPTOKEYB "corsix-th" $HOTKEY textinput -c "$GPTOKEYB_CONFIG" &

Before the fix:
when trying to save the game and clicking "Save" nothing would happen because the filename would remain empty due to inability to enter anything

After the fix:
when trying to save the game the filename can be changed with the Start+DPAD so that once "Save" is clicked, the game is actually saved.

Expected behaviour:

• filename should be enterable
• savegame file should appear
• savegame file should be loadable