feat: add Waterfox theme foundation

(cherry picked from commit 02227c4987f912c95a957bc24f7a8d63fc616fe3)

browser/locales/en-US/browser/appExtensionFields.ftl

@@ -14,5 +14,5 @@ extension-firefox-compact-light-description=A theme with a light color scheme.
 extension-firefox-compact-dark-name=Dark
 extension-firefox-compact-dark-description=A theme with a dark color scheme.
 
-extension-firefox-alpenglow-name=Firefox Alpenglow
+extension-firefox-alpenglow-name=Alpenglow
 extension-firefox-alpenglow-description=Use a colorful appearance for buttons, menus, and windows.

browser/themes/addons/alpenglow/manifest.json

@@ -7,7 +7,7 @@
     }
   },
 
-  "name": "Firefox Alpenglow",
+  "name": "Alpenglow",
   "description": "Use a colorful appearance for buttons, menus, and windows.",
   "version": "1.5",
   "icons": { "32": "icon.svg" },

waterfox/browser/moz.build

@@ -4,7 +4,10 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-DIRS += ["extensions/common"]
+DIRS += [
+    "extensions/common",
+    "themes",
+    ]
 
 DIST_SUBDIR = "browser"
 export("DIST_SUBDIR")

waterfox/browser/themes/jar.mn

@@ -0,0 +1,3 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.

waterfox/browser/themes/moz.build

@@ -0,0 +1,7 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+JAR_MANIFESTS += ["jar.mn"]