chore: add prettier

.prettierignore

@@ -0,0 +1,6 @@
+# Schema files
+specs/**
+docs/public/specs/**
+docs/public/schema/**
+packages/vgplot/spec/dist/mosaic-schema.json
+

.prettierrc.json

@@ -0,0 +1,7 @@
+{
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "printWidth": 100,
+  "arrowParens": "avoid"
+}

bin/publish-schema.js

@@ -6,7 +6,8 @@ import { copyFile, readFile, symlink, unlink } from 'node:fs/promises';
 async function link(schemaFile, linkFile) {
   try {
     await unlink(linkFile);
-  } catch (err) { // eslint-disable-line @typescript-eslint/no-unused-vars
+    // eslint-disable-next-line
+  } catch (err) { // @typescript-eslint/no-unused-vars
     // file may not have existed
   }
   await symlink(schemaFile, linkFile);

eslint.config.js

@@ -1,6 +1,7 @@
 import js from '@eslint/js';
 import tseslint from 'typescript-eslint';
 import globals from 'globals';
+import eslintConfigPrettier from 'eslint-config-prettier/flat';
 
 /** @type {import('@types/eslint').Linter.Config[]} */
 export default tseslint.config(
@@ -27,5 +28,6 @@ export default tseslint.config(
       "@typescript-eslint/no-this-alias": "warn",
       "@typescript-eslint/ban-ts-comment": "warn"
     },
-  }
+  },
+  eslintConfigPrettier
 );