add: markdown emoji parsing

Cargo.lock

@@ -949,6 +949,15 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
+[[package]]
+name = "emojis"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99e1f1df1f181f2539bac8bf027d31ca5ffbf9e559e3f2d09413b9107b5c02f4"
+dependencies = [
+ "phf",
+]
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.35"
@@ -3731,6 +3740,7 @@ dependencies = [
  "base64 0.22.1",
  "bb8-postgres",
  "bitflags 2.9.0",
+ "emojis",
  "md-5",
  "pathbufd",
  "redis",