docs: Add PHILOSOPHY.md

PHILOSOPHY.md

@@ -0,0 +1,32 @@
+# Limine's Design Philosophy
+
+### Why not support filesystem X or feature Y? (eg: LUKS, LVM)
+
+The idea with Limine is to remove the responsibility of parsing filesystems and formats, aside from the bare minimum necessities (eg: FAT*, ISO9660),
+from the bootloader itself.
+It is a needless duplication of efforts to have bootloaders support all possible filesystems and formats, and it leads to massive, bloated
+bootloaders as a result (eg: GRUB2).
+What is needed is to simply make sure the bootloader is capable of reading its own files, configuration, and be able to load kernel/module files
+from disk. The kernel should be responsible for parsing everything else as it sees fit.
+
+### What about LUKS? What about security? Encrypt the kernel!
+
+Simply put, this is unnecessary. Putting the kernel/modules in a readable FAT32 partition and letting Limine know about their BLAKE2B checksums
+in the config file provides as much security as encrypting the kernel does.
+
+### What? But what if someone modifies the config file! Ha! You clearly have not thought about that!
+
+We have. While this is a pointless effort on legacy x86 BIOS, it is a reasonable expectation on UEFI systems with Secure Boot. Limine provides a
+way to modify its own EFI executable to bake in the BLAKE2B checksum of the config file itself. The EFI executable gets then enrolled or otherwise
+verified by the Secure Boot loader through, eg., the shim project. This prevents modifications being done to the config file (and in turn the
+checksums contained there) from going unnoticed.
+
+### What about ext2/3/4? Why is that supported then?
+
+Simply put, legacy. And because a lot of Linux users expect it to "work that way". It is not unreasonable for ext2/3/4 support to be eventually
+dropped.
+
+### But I don't want to have a separate FAT boot partition! I don't want it!!!
+
+Well tough luck. It is `$year_following_2012` now and most PCs are equipped with UEFI and simply won't boot without a FAT EFI system partition
+anyways. It is not unreasonable to share the EFI system partition with the OS's /boot and store kernels and initramfses there.

README.md

@@ -23,19 +23,18 @@ as the reference implementation for the [Limine boot protocol](/PROTOCOL.md).
 * Multiboot 2
 * Chainloading
 
+### Supported partitioning schemes
+* MBR
+* GPT
+* Unpartitioned media
+
 ### Supported filesystems
 * ext2/3/4
 * FAT12/16/32
 * ISO9660 (CDs/DVDs)
 
-Even though these are the filesystems Limine supports directly, *any*
-filesystem can be utilised by the kernel provided that the kernel (and any
-needed modules) are on a directly supported filesystem.
-
-### Supported partitioning schemes
-* MBR
-* GPT
-* Unpartitioned media
+If your filesystem isn't listed here, please read [the philosophy](/PHILOSOPHY.md) first, especially before
+opening issues or pull requests related to this.
 
 ### Minimum system requirements
 For 32-bit x86 systems, support is only ensured starting with those with