refactor: Split config files

src/config/client.js

@@ -0,0 +1,15 @@
+export const CLIENT_WEB = "web";
+export const CLIENT_CHROME = "chrome";
+export const CLIENT_EDGE = "edge";
+export const CLIENT_FIREFOX = "firefox";
+export const CLIENT_USERSCRIPT = "userscript";
+export const CLIENT_THUNDERBIRD = "thunderbird";
+export const CLIENT_EXTS = [
+  CLIENT_CHROME,
+  CLIENT_EDGE,
+  CLIENT_FIREFOX,
+  CLIENT_THUNDERBIRD,
+];
+
+export const DEFAULT_USER_AGENT =
+  "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36";