feat: make AGS colorshell configuration fully declarative

- Add complete colorshell v2.0.3 configuration to home/ags-config/
- Disable runner plugin and NightLight tile (incompatible with NixOS)
- Customize SCSS with full opacity (no transparency)
- Add dark pale blue color scheme in home/pywal-colors/
- Configure Papirus-Dark icon theme via home-manager
- Make ~/.config/ags/ immutable and managed by Nix store
- Auto-deploy pywal colors to ~/.cache/wal/colors.json

All AGS configuration is now reproducible and version controlled.

home/ags-config/i18n/intl.ts

@@ -0,0 +1,58 @@
+import GLib from "gi://GLib?version=2.0";
+
+const i18nKeys = {
+  en_US: (await import("./lang/en_US")).default,
+  fr_FR: (await import("./lang/fr_FR")).default,
+  fr_BE: (await import("./lang/fr_FR")).default,
+  pt_BR: (await import("./lang/pt_BR")).default,
+  ru_RU: (await import("./lang/ru_RU")).default,
+};
+
+const languages: Array<string> = Object.keys(i18nKeys);
+let language: string = getSystemLanguage();
+
+export function getSystemLanguage(): string {
+  const sysLanguage: string | null | undefined =
+      GLib.getenv("LANG") ?? GLib.getenv("LANGUAGE"),
+    splitted: Array<string> | undefined = sysLanguage?.split(".");
+
+  if (!splitted || !languages.includes(splitted![0])) {
+    console.warn(`Intl: Falling back to default \`${languages[0]}\``);
+    return languages[0];
+  }
+
+  return splitted![0];
+}
+
+export function setLanguage(lang: string): string {
+  languages.map((cur: string) => {
+    if (cur === lang) {
+      language = lang;
+      return lang;
+    }
+  });
+
+  throw new Error(`Intl: couldn't set language: ${lang}`, {
+    cause: `language ${lang} not found in languages of type ${typeof languages}`,
+  });
+}
+
+export function tr(key: string): string {
+  let result = i18nKeys[language as keyof typeof i18nKeys],
+    defResult = i18nKeys[languages[0] as keyof typeof i18nKeys];
+
+  for (const keyString of key.split(".")) {
+    result = result[keyString as keyof typeof result] as never;
+    defResult = defResult[keyString as keyof typeof defResult] as never;
+  }
+
+  return typeof result == "string"
+    ? result
+    : typeof defResult == "string"
+    ? defResult
+    : 'not found / is not of type "string"';
+}
+
+export function trGet() {
+  return i18nKeys[getSystemLanguage() as keyof typeof i18nKeys];
+}