Rewrite core of the XTLDR boot loader

Reviewed-on: #7
Reviewed-by: Piotr Likoski <likoski@noreply.codingworkshop.git>
Co-authored-by: Rafal Kupiec <belliash@codingworkshop.eu.org>
Co-committed-by: Rafal Kupiec <belliash@codingworkshop.eu.org>

bootdata/xtldr/CMakeLists.txt

@@ -1 +1 @@
-set_install_file(xtldr.ini efi/boot)
+set_install_file(xtldr.ini efi/boot/xtldr)