update: improve project structure and add linting/formatting

- Remove duplicate lucide-svelte package, keep @lucide/svelte
- Move schema from src/lib/server/ to src/lib/db/ for better organization
- Add path aliases to svelte.config.js (, , , , )
- Add ESLint and Prettier configuration with 2-space indentation
- Update all imports to use new schema location and icon package

eslint.config.js

@@ -0,0 +1,30 @@
+import js from '@eslint/js';
+import ts from 'typescript-eslint';
+import svelte from 'eslint-plugin-svelte';
+import globals from 'globals';
+
+/** @type {import('eslint').Linter.Config[]} */
+export default [
+	js.configs.recommended,
+	...ts.configs.recommended,
+	...svelte.configs['flat/recommended'],
+	{
+		languageOptions: {
+			globals: {
+				...globals.browser,
+				...globals.node
+			}
+		}
+	},
+	{
+		files: ['**/*.svelte'],
+		languageOptions: {
+			parserOptions: {
+				parser: ts.parser
+			}
+		}
+	},
+	{
+		ignores: ['build/', '.svelte-kit/', 'dist/']
+	}
+];