feat: add lint support for .peggy

Author: zdm

lib/lint/file.js

@@ -98,6 +98,12 @@ customMime.add( {
     "filenames": [ "dockerfile", "*.dockerfile" ],
 } );
 
+customMime.add( {
+    "essence": "application/x-peggy",
+    "compressible": true,
+    "extnames": [ ".peggy" ],
+} );
+
 const DEFAULT_ESLINT_CONFIG_JAVASCRIPT = import.meta.resolve( "#resources/eslint.config.javascript.js" ),
     DEFAULT_ESLINT_CONFIG_VUE = import.meta.resolve( "#resources/eslint.config.vue.js" ),
     DEFAULT_ESLINT_CONFIG_TYPESCRIPT = import.meta.resolve( "#resources/eslint.config.typescript.js" );
@@ -232,6 +238,7 @@ const USE_PRETTIER_FOR_JS = true,
         "text/x-lua": {},
         "text/x-vim": {},
         "text/plain": {},
+        "text/x-peggy": {},
     };
 
 // prepare types