funai_upg: add support for decryption + keys & add funai_upg_phl extractor for them

src/formats/funai_upg_phl/include.rs

@@ -0,0 +1,16 @@
+use binrw::BinRead;
+
+#[derive(BinRead)]
+pub struct Header {
+    _magic_bytes: [u8; 6],
+    pub entries: [BodyHeader; 8],
+    _unk: u16,
+    _data_checksum: u32,
+    _unk2: u32,
+}
+
+#[derive(BinRead)]
+pub struct BodyHeader {
+    pub body_type: u16,
+    pub size: u32,
+}