[#213][CSS/Pre-commit] Add stylelint and remove csslint.

This is the (main) reason they are not compatible:
CSSLint/csslint#792.

.pre-commit-config.yaml

@@ -62,10 +62,14 @@ repos:
         types: [file]
 
   # CSS
-  - repo: https://github.com/pre-commit/mirrors-csslint
-    rev: v1.0.5
+  - repo: local
     hooks:
-      - id: csslint
+      - id: stylelint
+        name: stylelint
+        entry: npx stylelint
+        language: system
+        types: [css]
+        args: [--fix, --color, --report-invalid-scope-disables, --report-needless-disables]
 
   - repo: local
     hooks:
@@ -87,7 +91,7 @@ repos:
         name: json-tool
         entry: pre-commit/json-tool.sh
         language: system
-        files: (.csslintrc|\.json)$
+        files: \.json$
         types: [file]
         exclude: tsconfig\.json$
 

.stylelintrc.json

@@ -0,0 +1,5 @@
+{
+  "extends": [
+    "stylelint-config-standard"
+  ]
+}

Makefile

@@ -251,7 +251,8 @@ bin_install: FORCE
 npm_install: FORCE
 	npm install \
 		--save-dev \
-		"typescript"
+		"typescript" \
+		"stylelint"
 
 pip_install: requirements.txt
 	python -m pip install --upgrade pip $${PIP_FLAGS}

stats.sh

@@ -10,7 +10,7 @@ source .helpers
 # shellcheck disable=SC2016
 readonly COMMIT_MESSAGE='[Stats] Run `make stats`.'
 
-readonly KNOWN_EXTENSIONS="Makefile css csslintrc env_INFO helpers gitignore yamlfmt yamllint json mjs keylayout md plist py sh strings txt yaml toml ts html"
+readonly KNOWN_EXTENSIONS="Makefile css env_INFO helpers gitignore yamlfmt yamllint json mjs keylayout md plist py sh strings txt yaml toml ts html"
 readonly KNOWN_EXTENSIONS_ARCHIVE="gitignore java js md proto py sh sql vba"
 readonly KNOWN_ARCHIVE_SUBDIRS="bible dictionary ipa-transliteration unicode-converters"
 
@@ -229,7 +229,7 @@ LOC_DOT=$(loc . -name ".gitignore" )
 LOC_KEYBOARD_LAYOUT=$(loc . -a \( -name "*.keylayout" -o -name "*.plist" -o -name "*.strings" \) )
 LOC_TXT=$(loc . -name "*.txt")
 LOC_TS=$(loc . -name "*.ts")
-LOC_JSON=$(loc . -a \( -name "*.json" -o -name ".csslintrc" \) )
+LOC_JSON=$(loc . -name "*.json" )
 LOC_HTML=$(loc . -name "*.html")
 
 readonly TOTAL_BY_LANG="$((
@@ -261,7 +261,7 @@ FOC_DOT=$(foc_count . -name ".gitignore" )
 FOC_KEYBOARD_LAYOUT=$(foc_count . -a \( -name "*.keylayout" -o -name "*.plist" -o -name "*.strings" \) )
 FOC_TXT=$(foc_count . -name "*.txt")
 FOC_TS=$(foc_count . -name "*.ts")
-FOC_JSON=$(foc_count . -a \( -name "*.json" -o -name ".csslintrc" \) )
+FOC_JSON=$(foc_count . -name "*.json" )
 FOC_HTML=$(foc_count . -name "*.html")
 
 readonly TOTAL_FOC="$((