Add basic emote psb file export support

Cargo.lock

@@ -126,6 +126,12 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
+[[package]]
+name = "base64"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
+
 [[package]]
 name = "bit-set"
 version = "0.8.0"
@@ -1302,6 +1308,7 @@ name = "msg_tool"
 version = "0.2.4"
 dependencies = [
  "anyhow",
+ "base64",
  "byteorder",
  "clap 4.5.47",
  "csv",