[core/filesystem] "easier" cheats folder structure like Ryujinx (#2795)

Less annoying way to make cheats

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2795
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

docs/user/Storage.md

@@ -0,0 +1,39 @@
+# User Handbook - Data, savefiles and storage
+
+## Cheats
+
+Cheats can be placed in the two manners:
+
+**Method 1**:
+- Right click on "Open mod directory"
+- Create a file called `cheat_mycheat.txt` (the file must start with `cheat_` to be recognized as one)
+- Write the cheat into said text file
+- Done
+
+This method doesn't account for build IDs, so any cheats for previous builds will not be automatically filtered out.
+
+**Method 2**:
+- Right click on "Open mod directory"
+- Create a folder called `My cheat`
+- Inside said folder create another one: `cheats`
+- Then inside said folder create a file with the build ID in hexadecimal, lowercase, for example `1234FBCDE0000000.txt`
+- Write the cheat into said text file
+- Done
+
+To delete a cheat simply do the process backwards (delete the folder/file).
+
+## Savefiles
+
+The method to access save data is simple:
+- Right click on "Open save directory"
+
+## Maintaining a library
+
+### ZFS
+
+One of the best ways to keep a gallery of archives is using a ZFS pool compressed with zstd.
+```sh
+sudo zfs create zroot/switch`
+sudo zfs set compression=zstd zroot/switch
+```
+A new ZFS dataset will then be available on `/zroot/switch`. From which then can be added as a normal game directory. Remember to ensure proper permissions with `chmod 755 /zroot/switch/*`.