Move fomantic and jQuery to main webpack bundle (#11997)

This saves around 3 MB binary size by not including useless fomantic
files in the build. Also, this allows us to move jQuery into the main
bundle as well which eliminates a few HTTP requests.

Also included are webpack config changes:

- split less and css loaders to speed up compliation
- enable css sourcemaps
- switch css minfier plugin to cssnano-webpack-plugin which works better
  for sourcemaps than the previous plugin

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

package-lock.json

@@ -3458,6 +3458,15 @@
       "resolved": "https://registry.npmjs.org/cssnano-util-same-parent/-/cssnano-util-same-parent-4.0.1.tgz",
       "integrity": "sha512-WcKx5OY+KoSIAxBW6UBBRay1U6vkYheCdjyVNDm85zt5K9mHoGOfsOsqIszfAqrQQFIIKgjh2+FDgIj/zsl21Q=="
     },
+    "cssnano-webpack-plugin": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/cssnano-webpack-plugin/-/cssnano-webpack-plugin-1.0.3.tgz",
+      "integrity": "sha512-OkxkOR6WlTBdIbPObCTWuUuZCr3bDPYClm5gquo2LEkOCvM1mbI9MAUstqS2+u6pImnd2f6dNgmmcvVbmYJ7fg==",
+      "requires": {
+        "cssnano": "^4.1.10",
+        "webpack-sources": "^1.4.3"
+      }
+    },
     "csso": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/csso/-/csso-4.0.3.tgz",
@@ -7897,15 +7906,6 @@
       "integrity": "sha512-eYboRV94Vco725nKMlpkn3nV2+96p9c3gKXRsYqAJSswSENvBhN7n5L+uDhY58xQa0UukWsDMTGELzmD8Q+wTA==",
       "dev": true
     },
-    "last-call-webpack-plugin": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/last-call-webpack-plugin/-/last-call-webpack-plugin-3.0.0.tgz",
-      "integrity": "sha512-7KI2l2GIZa9p2spzPIVZBYyNKkN+e/SQPpnjlTiPhdbDW3F86tdKKELxKpzJ5sgU19wQWsACULZmpTPYHeWO5w==",
-      "requires": {
-        "lodash": "^4.17.5",
-        "webpack-sources": "^1.1.0"
-      }
-    },
     "last-run": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/last-run/-/last-run-1.1.1.tgz",
@@ -9617,15 +9617,6 @@
         "mimic-fn": "^1.0.0"
       }
     },
-    "optimize-css-assets-webpack-plugin": {
-      "version": "5.0.3",
-      "resolved": "https://registry.npmjs.org/optimize-css-assets-webpack-plugin/-/optimize-css-assets-webpack-plugin-5.0.3.tgz",
-      "integrity": "sha512-q9fbvCRS6EYtUKKSwI87qm2IxlyJK5b4dygW1rKUBT6mMDhdG5e5bZT63v6tnJR9F9FB/H5a0HTmtw+laUBxKA==",
-      "requires": {
-        "cssnano": "^4.1.10",
-        "last-call-webpack-plugin": "^3.0.0"
-      }
-    },
     "optionator": {
       "version": "0.9.1",
       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.9.1.tgz",
@@ -10932,6 +10923,7 @@
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/postcss-safe-parser/-/postcss-safe-parser-4.0.2.tgz",
       "integrity": "sha512-Uw6ekxSWNLCPesSv/cmqf2bY/77z11O7jZGPax3ycZMFU/oi2DMH9i89AdHc1tRwFg/arFoEwX0IS3LCUxJh1g==",
+      "dev": true,
       "requires": {
         "postcss": "^7.0.26"
       }