Fix code quality tools configuration and update documentation

.stylelintrc.json

@@ -0,0 +1,49 @@
+{
+  "extends": "stylelint-config-standard",
+  "rules": {
+    "indentation": 4,
+    "string-quotes": "single",
+    "no-duplicate-selectors": true,
+    "color-hex-case": "lower",
+    "color-hex-length": "short",
+    "selector-combinator-space-after": "always",
+    "selector-attribute-quotes": "always",
+    "selector-attribute-operator-space-before": "never",
+    "selector-attribute-operator-space-after": "never",
+    "selector-attribute-brackets-space-inside": "never",
+    "declaration-block-trailing-semicolon": "always",
+    "declaration-colon-space-before": "never",
+    "declaration-colon-space-after": "always",
+    "property-no-vendor-prefix": true,
+    "value-no-vendor-prefix": true,
+    "number-leading-zero": "always",
+    "function-url-quotes": "always",
+    "font-weight-notation": "numeric",
+    "font-family-name-quotes": "always-where-recommended",
+    "at-rule-no-vendor-prefix": true,
+    "selector-no-vendor-prefix": true,
+    "media-feature-name-no-vendor-prefix": true,
+    "at-rule-empty-line-before": [
+      "always",
+      {
+        "except": [
+          "blockless-after-same-name-blockless",
+          "first-nested"
+        ],
+        "ignore": [
+          "after-comment"
+        ]
+      }
+    ],
+    "at-rule-name-case": "lower",
+    "at-rule-name-space-after": "always-single-line",
+    "at-rule-semicolon-newline-after": "always"
+  },
+  "ignoreFiles": [
+    "vendor/**",
+    "node_modules/**",
+    "build/**",
+    "dist/**",
+    "bin/**"
+  ]
+}