refactor: remove biome configuration and update dependencies

- Deleted the obsolete biome.json file to streamline project configuration.
- Updated package.json and bun.lock to include new ESLint and Prettier dependencies for improved code quality and consistency.
- Added ESLint configuration package for better linting support across the project.
- Cleaned up various package dependencies to ensure a more maintainable and efficient codebase.

packages/backend/eslint.config.js

@@ -0,0 +1,7 @@
+import { config } from '@sgse-app/eslint-config/convex';
+import { defineConfig } from 'eslint/config';
+ 
+/** @type {import("eslint").Linter.Config} */
+export default defineConfig([
+  ...config,
+]);

packages/backend/package.json

@@ -9,6 +9,7 @@
   "license": "ISC",
   "description": "",
   "devDependencies": {
+    "@sgse-app/eslint-config": "*",
     "@types/cookie": "^1.0.0",
     "@types/estree": "^1.0.8",
     "@types/nodemailer": "^7.0.3",
@@ -17,7 +18,8 @@
     "@types/pako": "^2.0.4",
     "@types/raf": "^3.4.3",
     "@types/trusted-types": "^2.0.7",
-    "typescript": "catalog:"
+    "typescript": "catalog:",
+    "eslint": "catalog:"
   },
   "dependencies": {
     "@convex-dev/better-auth": "^0.9.7",

packages/eslint-config/base.js

@@ -0,0 +1,13 @@
+import js from "@eslint/js";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+
+export const config = [
+	{
+		files: ["**/*.{js,mjs,cjs,ts,mts,cts}"],
+		plugins: { js },
+		extends: ["js/recommended"],
+		languageOptions: { globals: { ...globals.browser, ...globals.node } },
+	},
+	tseslint.configs.recommended,
+]

packages/eslint-config/convex.js

@@ -0,0 +1,7 @@
+import convexPlugin from "@convex-dev/eslint-plugin";
+import { config as baseConfig } from "./base.js";
+
+export const config =[
+	...baseConfig,
+  ...convexPlugin.configs.recommended,
+]

packages/eslint-config/package.json

@@ -0,0 +1,28 @@
+{
+  "name": "@sgse-app/eslint-config",
+  "version": "0.0.0",
+  "type": "module",
+  "private": true,
+  "exports": {
+    "./base": "./base.js",
+    "./convex": "./convex.js",
+    "./svelte": "./svelte.js"
+  },
+  "devDependencies": {
+    "@eslint/js": "catalog:",
+    "@next/eslint-plugin-next": "^15.5.0",
+    "eslint": "catalog:",
+    "eslint-config-prettier": "^10.1.1",
+    "eslint-plugin-only-warn": "^1.1.0",
+    "eslint-plugin-react": "^7.37.5",
+    "eslint-plugin-react-hooks": "^5.2.0",
+    "eslint-plugin-turbo": "^2.6.0",
+    "globals": "^16.5.0",
+    "typescript": "^5.9.2",
+    "typescript-eslint": "^8.46.3"
+  },
+  "dependencies": {
+    "@convex-dev/eslint-plugin": "^1.0.0",
+    "eslint-plugin-svelte": "^3.13.0"
+  }
+}

packages/eslint-config/svelte.js

@@ -0,0 +1,16 @@
+import svelte from "eslint-plugin-svelte";
+import ts from "typescript-eslint";
+import { config as baseConfig } from "./base.js";
+
+export const config = [
+	...baseConfig,
+	...svelte.configs.recommended,
+	...svelte.configs.prettier,
+  {
+    rules: {
+			// typescript-eslint strongly recommend that you do not use the no-undef lint rule on TypeScript projects.
+			// see: https://typescript-eslint.io/troubleshooting/faqs/eslint/#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
+			'no-undef': 'off'
+		}
+  }
+]