build: Fix gaps in lint coverage and update old patterns

eslint:
* Remove hardcoded glob paths that are (relatively slow) to expand
  before linting could start, in favour of specifying directories
  which can be iterated while linting happens.
* JSON files in i18n/ were skipped, unlike other repos.
  JS code under .storybook/ was skipped.
  JS code under resources/ext.popups/ was skipped.
  Fix all these by doing what other repos do, which is to let
  ESLint iterate the repository and tell it which directories not to
  enter. This has the happy side-effect of making IDE integrations
  for ESLint work correctly (as customisation in package.json has the
  same problems as using Gruntfile, namely that invoking 'eslint'
  directly can't be aware of this), as well as allowing things like
  `eslint --fix` to be used.

```
/Popups/resources/ext.popups/index.js
  4:2  error  Unexpected var, use let or const instead  no-var
```

nyc:
* Remove SPAWN_WRAP_SHIM_ROOT.
  This was a hack for an early CI experiment that hasn't been
  needed for several years.

storybook:
* Remove gitignore entries for additional npm and build output in the
  storybook subdirectory, which appears to not exist anymore since
  189b386a13.

Doxygen:
* Sync with cookiecutter example from
  https://gerrit.wikimedia.org/g/mediawiki/tools/cookiecutter-library/+/HEAD/
  - remove redundant stuff,
  - enable quiet mode to hide verbose non-warning,
  - include CoC.

Change-Id: If8f6b833067192aea96a87f04c7978c9af11f996

.eslintignore

@@ -0,0 +1,5 @@
+# coverage
+/.nyc_output/
+# docs and storybook
+/docs/
+/vendor/

.gitignore

@@ -6,8 +6,6 @@
 /vendor/
 /composer.lock
 /.eslintcache
-/.storybook/node_modules
-/.storybook/dist
 /.storybook/mocks/**/*.less
 /tests/selenium/log
 .DS_Store

Doxyfile

@@ -1,3 +1,5 @@
+# Doxyfile <https://www.doxygen.nl/manual/config.html>
+
 PROJECT_NAME           = Popups
 PROJECT_BRIEF          = "Displays page/reference previews when hovering over a link to an article/reference."
 
@@ -9,8 +11,9 @@ JAVADOC_AUTOBRIEF      = YES
 QT_AUTOBRIEF           = YES
 
 WARN_NO_PARAMDOC       = YES
+QUIET                  = YES
 
-INPUT                  = .
+INPUT                  = README.md CODE_OF_CONDUCT.md .
 EXCLUDE_PATTERNS       = doc docs vendor node_modules tests
 FILE_PATTERNS          = *.php
 
@@ -18,19 +21,9 @@ FILE_PATTERNS          = *.php
 RECURSIVE              = YES
 
 # NOTE: USE_MDFILE_AS_MAINPAGE requires that the specified file is included as an input file.
-USE_MDFILE_AS_MAINPAGE = ./README.md
-INPUT                 += ./README.md
+USE_MDFILE_AS_MAINPAGE = README.md
 
 HTML_DYNAMIC_SECTIONS  = YES
 GENERATE_TREEVIEW      = YES
 TREEVIEW_WIDTH         = 250
-
 GENERATE_LATEX         = NO
-
-HAVE_DOT               = YES
-DOT_FONTNAME           = Helvetica
-DOT_FONTSIZE           = 12
-TEMPLATE_RELATIONS     = YES
-
-# Makes dot run faster. Requires graphviz >1.8.10
-DOT_MULTI_TARGETS      = YES

package.json

@@ -12,9 +12,9 @@
 		"test:lint:styles": "npm -s run linter:styles",
 		"test:lint:i18n": "banana-checker --requireLowerCase=0 i18n/",
 		"check-built-assets": "echo 'CHECKING BUILD SOURCES ARE COMMITTED OR STAGED' && npm -s run build && git diff --exit-code resources/dist || { npm run node-debug; false; }",
-		"coverage": "SPAWN_WRAP_SHIM_ROOT=\"$PWD/.nyc_output\" nyc npm -s run test:unit",
+		"coverage": "nyc npm -s run test:unit",
 		"doc": "jsdoc -c jsdoc.json && npm run build-storybook",
-		"linter:js": "eslint --cache '*.{js,json}' 'src/**/*.{js,json}' 'tests/**/*.{js,json}' 'resources/dist/*.js'",
+		"linter:js": "eslint --cache .",
 		"linter:styles": "stylelint 'src/**/*.less'",
 		"minify-svg": "svgo --config=.svgo.config.js -q -r -f resources/ext.popups.images/",
 		"node-debug": "node -v && npm -v && echo 'Please ensure you are running the correct version of nvm before running this command.'",

resources/.eslintrc.json

@@ -0,0 +1,4 @@
+{
+	"root": true,
+	"extends": "wikimedia/language/es5"
+}

resources/dist/.eslintrc.json

@@ -1,6 +1,4 @@
 {
-	"root": true,
-	"extends": "wikimedia/language/es5",
 	"rules": {
 		"es/no-object-getownpropertysymbols": "off"
 	}