Resolve "feat: Add neutral theme"

Closes #12 (closed) #13 (closed)

about.json

+{
+  "name": "Community Theme",
+  "about_url": null,
+  "license_url": null,
+  "color_schemes": {
+      "Community Light": {
+          "primary": "222222",
+          "secondary": "ffffff",
+          "tertiary": "a9a4a4",
+          "quaternary": "797979",
+          "primary-medium": "C7C7C7",
+          "primary-low-mid": "eeeeee",
+          "header_background": "ffffff",
+          "header_primary": "333333",
+          "highlight": "ffff4d",
+          "danger": "e45735",
+          "success": "009900",
+          "love": "fa6c8d"
+    },
+      "Community Dark": {
+          "primary": "dddddd",
+          "secondary": "161616",
+          "tertiary": "cfcfcf",
+          "quaternary": "c14924",
+          "primary-medium": "C7C7C7",
+          "primary-low-mid": "eeeeee",
+          "header_background": "837e7e",
+          "header_primary": "222222",
+          "highlight": "a87137",
+          "danger": "e45735",
+          "success": "1ca551",
+          "love": "fa6c8d"
+    }
+  },
+  "components": ["https://github.com/tshenry/discourse-versatile-banner.git","https://github.com/tshenry/discourse-categories-layout-override.git",
+    "https://github.com/discourse/discourse-showcased-categories.git", "https://github.com/discourse/discourse-category-icons.git",
+  "https://github.com/discourse/DiscoTOC.git", "https://github.com/discourse/discourse-category-banners.git", "https://github.com/discourse/discourse-loading-slider.git",
+"https://github.com/discourse/Discourse-easy-footer.git", "https://github.com/discourse/discourse-icon-header-links.git"]
+}