fix: read sudachi keys from its keys folder

fs_paths.h:18 KEYS_DIR "keys" below the user data directory, as the profile notes cite.

emulators/sudachi.yml

@@ -45,31 +45,31 @@ notes: |
 files:
   - name: "prod.keys"
     required: true
-    path: "switch/prod.keys"
+    path: "keys/prod.keys"
     note: "Production keys for NCA decryption (master, key area, header, titlekek)"
     source_ref: "src/core/crypto/key_manager.cpp:660-661"
 
   - name: "dev.keys"
     required: false
-    path: "switch/dev.keys"
+    path: "keys/dev.keys"
     note: "Development-unit keys, read instead of prod.keys when use_dev_keys is set"
     source_ref: "src/core/crypto/key_manager.cpp:654-657"
 
   - name: "title.keys"
     required: false
-    path: "switch/title.keys"
+    path: "keys/title.keys"
     note: "Per-title encryption keys (rights_id to titlekey mappings)"
     source_ref: "src/core/crypto/key_manager.cpp:664-665"
 
   - name: "console.keys"
     required: false
-    path: "switch/console.keys"
+    path: "keys/console.keys"
     note: "Console-specific keys (BIS, SD seed)"
     source_ref: "src/core/crypto/key_manager.cpp:666-667"
 
   - name: "key_retail.bin"
     required: false
-    path: "switch/key_retail.bin"
+    path: "keys/key_retail.bin"
     size: 160
     note: "Amiibo decryption keys (two InternalKey structs, 0x50 bytes each)"
     source_ref: "src/core/hle/service/nfc/common/amiibo_crypto.cpp:273-295"