[Tech debt] Update various linter ignore files (#5045)

* [stylelint] Ignore non-scss files

* [eslint] Ignore non src/src-docs files that contain JS files

- the folders added in this commit already contain multiple eslint violations and likely shouldn't report problems in VSCode if we're not checking for them in CI

* [eslint] Remove unused .snap.js ignore

- we currently don't have any files with this format - they all end in .snap which eslint doesn't parse in any case

* [eslint][opinionated] Specify js icon assets being ignored

- these appear to only be located in src/components/icons, and I thought it would be more helpful to specifically list that folder to potentially make cleaning it up easier in the future, and also to avoid skipping linting on other asset files that might want it

* [eslint] Remove singleton file being ignored

- in favor of just fixing the lint complaints within the file

.eslintignore

@@ -5,8 +5,9 @@ lib
 test-env
 types
 eui.d.ts
-**/*.snap.js
-**/assets/**/*.js
+src/components/icon/assets/**/*.js
 package.json
-src-docs/src/views/icon/icon_example.js
-packages/react-datepicker/examples
+docs
+packages
+scripts
+generator-eui

.stylelintrc

@@ -2,5 +2,11 @@
   "rules": {
     "number-leading-zero": "never",
     "color-hex-case": "upper"
-  }
-}
+  },
+  "ignoreFiles": [
+    "**/*.ts",
+    "**/*.tsx",
+    "**/*.js",
+    "**/*.jsx",
+  ]
+}

src-docs/src/views/icon/icon_example.js

@@ -211,8 +211,8 @@ export const IconExample = {
               Two-tone icons, like our app style icons, will behave similarly to
               normal glyphs when provided a specific color by applying the color
               to <strong>all</strong> the shapes within. You can force the icon
-              to match the parent's text color by passing{' '}
-              <EuiCode>color="inherit"</EuiCode> to the icon.
+              to match the parent&apos;s text color by passing{' '}
+              <EuiCode>color=&#34;inherit&#34;</EuiCode> to the icon.
             </p>
           </EuiText>
         </>