added support for dotenv files and config

gui/src/error.odin

@@ -0,0 +1,20 @@
+package main
+
+import "core:fmt"
+import "core:strings"
+ErrorType :: enum {
+	Config,
+	API,
+}
+
+Error :: struct {
+	type:    ErrorType,
+	message: string,
+}
+
+format_error :: proc(err: ^Error) -> string {
+	sb := strings.builder_make(context.temp_allocator)
+
+	return fmt.sbprintf(&sb, "[%s] => %s", err.type, err.message)
+}
+