chore: add cSpell to check spelling issues (#1482)

.cspell.json

@@ -0,0 +1,51 @@
+{
+  "version": "0.2",
+  "language": "en,en-gb",
+  "words": [
+    "pures",
+    "icss",
+    "styl",
+    "nosources",
+    "unknwon",
+    "mycss",
+    "memfs",
+    "Koppers",
+    "sokra",
+    "plusplus",
+    "localident",
+    "fullhash",
+    "requestify",
+    "XSSI",
+    "Requestable",
+    "requestable",
+    "requestify",
+    "nourl",
+    "stylesheet",
+    "classname",
+    "EACE",
+    "UAAU",
+    "AACZ",
+    "MCEP",
+    "stringifier",
+    "Zvby",
+    "uncnoun",
+    "bazzy",
+    "svars",
+    "concat",
+    "camelcase",
+    "Brotli",
+    "Contex",
+    "vspace",
+    "commitlint"
+  ],
+
+  "ignorePaths": [
+    "CHANGELOG.md",
+    "package.json",
+    "dist/**",
+    "**/__snapshots__/**",
+    "package-lock.json",
+    "**/*.css",
+    "**/fonts/**"
+  ]
+}

README.md

@@ -162,7 +162,7 @@ module.exports = {
                 return false;
               }
 
-              // Don't handle images under root-relatve /external_images/
+              // Don't handle images under root-relative /external_images/
               if (/^\/external_images\//.test(path)) {
                 return false;
               }
@@ -481,7 +481,7 @@ To import from multiple modules use multiple `composes:` rules.
 
 ```css
 :local(.className) {
-  composes: edit hightlight from "./edit.css";
+  composes: edit highlight from "./edit.css";
   composes: button from "module/button.css";
   composes: classFromThisModule;
   background: red;

lint-staged.config.js

@@ -1,4 +1,4 @@
 module.exports = {
-  "*": ["prettier --write --ignore-unknown"],
+  "*": ["prettier --write --ignore-unknown", "cspell"],
   "*.js": ["eslint --cache --fix"],
 };