migrate to .env for tokens and implement chats

Package.resolved

@@ -1,5 +1,5 @@
 {
-  "originHash" : "2cbecfe2d4d67f296ed2aa3c2fbb18dd36c40a3747dfb0c13c236dff21aa978a",
+  "originHash" : "013e9e1e9d97afe1dda54412c40ef66fa0272affe80244e4b96a14f96f42fbd9",
   "pins" : [
     {
       "identity" : "async-http-client",
@@ -28,6 +28,15 @@
         "version" : "1.13.2"
       }
     },
+    {
+      "identity" : "dotenv",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/swiftpackages/DotEnv.git",
+      "state" : {
+        "revision" : "1f15bb9de727d694af1d003a1a5d7a553752850f",
+        "version" : "3.0.0"
+      }
+    },
     {
       "identity" : "geminikit",
       "kind" : "remoteSourceControl",
@@ -211,7 +220,7 @@
     {
       "identity" : "swift-syntax",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/apple/swift-syntax.git",
+      "location" : "https://github.com/apple/swift-syntax",
       "state" : {
         "revision" : "f99ae8aa18f0cf0d53481901f88a0991dc3bd4a2",
         "version" : "601.0.1"