First steps: include Limine, kernel entry point, framebuffer request

Makefile

@@ -0,0 +1,29 @@
+build:
+	rm -f *.o
+	x86_64-elf-gcc -c -I src src/kmain.c -Wall -Wextra -std=gnu99 -nostdlib -ffreestanding -fno-stack-protector -fno-stack-check -fno-PIC -ffunction-sections -fdata-sections
+	x86_64-elf-ld -o kernel -T linker.ld *.o
+
+limine/limine:
+	rm -rf limine
+	git clone https://github.com/limine-bootloader/limine.git --branch=v9.x-binary --depth=1
+	$(MAKE) -C limine
+
+build-iso: limine/limine build
+	rm -rf iso_root
+	mkdir -p iso_root/boot
+	cp -v kernel iso_root/boot
+	mkdir -p iso_root/boot/limine
+	cp -v limine.conf iso_root/boot/limine
+	mkdir -p iso_root/EFI/BOOT
+	cp -v limine/limine-bios.sys limine/limine-bios-cd.bin limine/limine-uefi-cd.bin iso_root/boot/limine/
+	cp -v limine/BOOTX64.EFI iso_root/EFI/BOOT/
+	cp -v limine/BOOTIA32.EFI iso_root/EFI/BOOT/
+	xorriso -as mkisofs -R -r -J -b boot/limine/limine-bios-cd.bin \
+		-no-emul-boot -boot-load-size 4 -boot-info-table -hfsplus \
+		-apm-block-size 2048 --efi-boot boot/limine/limine-uefi-cd.bin \
+		-efi-boot-part --efi-boot-image --protective-msdos-label \
+		iso_root -o kernel.iso
+	./limine/limine bios-install kernel.iso
+
+clean:
+	rm -rf *.o kernel iso_root kernel.iso limine