migrate to .env for tokens and implement chats

Sources/NahiMacros/ReadEnv.swift

@@ -0,0 +1,27 @@
+import SwiftSyntax
+import SwiftSyntaxMacros
+import SwiftCompilerPlugin
+
+public struct ReadEnv: ExpressionMacro {
+    public static func expansion(of node: some FreestandingMacroExpansionSyntax, in context: some MacroExpansionContext) throws -> ExprSyntax {
+        guard let argument = node.arguments.first?.expression,
+            let segments = argument.as(StringLiteralExprSyntax.self)?.segments,
+            segments.count == 1,
+            case .stringSegment(let literalSegment)? = segments.first
+        else {
+            throw CustomError.message("Need a static string")
+        }
+
+        let name = literalSegment.content.text
+        return """
+        ProcessInfo.processInfo.environment["\(raw: name)"]
+        """
+    }
+}
+
+enum CustomError: Error { case message(String) }
+
+@main
+struct NahiMacros: CompilerPlugin {
+    var providingMacros: [Macro.Type] = [ReadEnv.self]
+}