port goose2 chat attachments into goose (#8534)

Signed-off-by: tulsi <tulsi@block.xyz>

ui/goose2/src-tauri/Cargo.lock

@@ -1754,6 +1754,7 @@ dependencies = [
  "acp-client",
  "agent-client-protocol",
  "async-trait",
+ "base64 0.22.1",
  "chrono",
  "dirs",
  "doctor",
@@ -1762,6 +1763,7 @@ dependencies = [
  "ignore",
  "keyring",
  "log",
+ "mime_guess",
  "serde",
  "serde_json",
  "serde_yaml",
@@ -2578,6 +2580,16 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "mime_guess"
+version = "2.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7c44f8e672c00fe5308fa235f821cb4198414e1c77935c1ab6948d3fd78550e"
+dependencies = [
+ "mime",
+ "unicase",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.8.9"
@@ -5341,6 +5353,12 @@ dependencies = [
  "unic-common",
 ]
 
+[[package]]
+name = "unicase"
+version = "2.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbc4bc3a9f746d862c45cb89d705aa10f187bb96c76001afab07a0d35ce60142"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.24"