added prettier + eslint | added addons support for pre-registered key callback mappings

Author: ctibo

.prettierignore

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+# Ignore artifacts:
+build

.prettierrc

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+{
+  "plugins": ["@ianvs/prettier-plugin-sort-imports"],
+  "overrides": [
+    {
+      "files": "*.svelte",
+      "options": { "parser": "svelte" }
+    }
+  ],
+  "printWidth": 80,
+  "tabWidth": 2,
+  "trailingComma": "all",
+  "singleQuote": true,
+  "semi": true,
+  "arrowParens": "always",
+
+  "importOrder": [
+    "<TYPES>",
+    "",
+    "<BUILTIN_MODULES>",
+    "<THIRD_PARTY_MODULES>",
+    "^svelte(.*)$",
+    "^@supeer(.*)$",
+    "",
+    "^\\$app/(.*)$",
+    "^\\$lib/(.*)$",
+    "^\\$entities/(.*)$",
+    "^\\$components/(.*)$",
+    "^[../]",
+    "^[./]",
+    ".css$"
+  ],
+  "importOrderSeparation": false,
+  "importOrderSortSpecifiers": true
+}

eslint.config.js

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+import eslintConfigPrettier from 'eslint-config-prettier';
+
+export default [eslintConfigPrettier];