explicitly specify prettier rules and decouple from eslint

this change decouples eslint and prettier (for reasoning, see:
https://prettier.io/docs/en/integrating-with-linters.html).

it also proposes a prettier config with all of the commonplace rules
explicitly set (instead of using the defaults).

README.md

@@ -4,4 +4,4 @@ A collection of lint, format, and build configs used at Fauna for TypeScript pro
 ## Included configs (`./config/`)
 - `eslint.config.js`, a minimal placeholder eslint config.
 - `.gitignore`, a minimal placeholder .gitignore file.
-- `prettierrc.js`, a minimal placeholder prettier config.
+- `prettierrc.js`, a minimal placeholder prettier config. this is a _stand-alone_ prettier config, and is used as a stand-alone; it's not integrated into eslint ([by choice](https://prettier.io/docs/en/integrating-with-linters.html)). run it before running eslint. we use [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) to remove eslint rules that collide with prettier, so prettier is authoritative on stylistic formatting.

config/eslint.config.js

@@ -1,3 +1,5 @@
+const eslintConfigPrettier = require("eslint-config-prettier");
+
 // borrowed from fauna-shell
 const config = [
   {
@@ -32,6 +34,8 @@ const config = [
       "no-unused-expressions": "off",
     },
   },
+  // this disables eslint's formatting rules that collide with prettier's
+  eslintConfigPrettier,
 ];
 
-module.exports = config;
+module.exports = { config };

config/prettierrc.js

@@ -1,12 +1,21 @@
 /**
  * @see https://prettier.io/docs/en/configuration.html
+ * @see https://prettier.io/docs/en/options
  * @type {import("prettier").Config}
  */
 const config = {
-  trailingComma: "es5",
-  tabWidth: 4,
-  semi: false,
-  singleQuote: true,
+  tabWidth: 2,
+  semi: true,
+  singleQuote: false,
+  quoteProps: "as-needed",
+  trailingComma: "all",
+  bracketSpacing: true,
+  bracketSameLine: false,
+  arrowParens: "always",
+  proseWrap: "preserve",
+  endOfLine: "lf",
+  embeddedLanguageFormatting: "auto",
+  singleAttributePerLine: false,
 };
 
 module.exports = config;

package.json

@@ -22,6 +22,7 @@
   },
   "homepage": "https://github.com/fauna/typescript#readme",
   "dependencies": {
+    "eslint-config-prettier": "^9.1.0",
     "mentions-regex": "^2.0.3",
     "parse-commit-message": "^5.0.4"
   },