Add info about all boot menu file locations

src/boot-menu/README.md

@@ -0,0 +1,28 @@
+## Theme files
+- BIOS (Syslinux)
+	- live:  
+		- stdmenu.cfg ->  
+                 `live-build-config/kali-config/common/includes.binary/isolinux/stdmenu.cfg`
+		- syslinux-splash.png ->  
+                 `live-build-config/kali-config/common/includes.binary/isolinux/splash.png`
+	- installer:  
+		- stdmenu.cfg ->  
+                 `debian-installer/build/boot/x86/stdmenu.cfg`
+		- syslinux-splash.png ->  
+                 `debian-installer/build/boot/x86/pics/kali.png`
+
+- UEFI (Grub)
+	- live:  
+		- config.cfg ->  
+                 `live-build-config/kali-config/common/bootloaders/grub-pc/config.cfg`  
+		- grub-splash.png ->  
+                 `live-build-config/kali-config/common/bootloaders/grub-pc/splash.png`  
+		- theme.txt ->  
+                 `live-build-config/kali-config/common/bootloaders/grub-pc/theme/theme.txt`  
+	- installer:  
+		- config.cfg ->  
+                 `debian-installer/build/boot/x86/grub/grub-efi.cfg`  
+		- grub-splash.png ->  
+                 `debian-installer/build/boot/x86/pics/kali.png`  
+		- theme.txt ->  
+                 `debian-cd/data/kali-rolling/grub-theme.in`