chore: Remove .env.example and update database configuration

- Deleted the .env.example file as it contained outdated database configuration.
- Updated the database configuration in src/db/config.ts to use a relative path for the memory database.
- Added a new changeset file to document the configuration update.

Author: spences10

.changeset/purple-shoes-remain.md

@@ -0,0 +1,5 @@
+---
+"mcp-memory-libsql": patch
+---
+
+update config

.env.example

@@ -1,11 +1,11 @@
 import { DatabaseConfig } from "./client.js";
 
 export function getDatabaseConfig(): DatabaseConfig {
-  const url = process.env.LIBSQL_URL || 'file:/memory-tool.db';
-  const authToken = process.env.LIBSQL_AUTH_TOKEN;
-  
-  return {
-    url,
-    authToken,
-  };
+	const url = process.env.LIBSQL_URL || "file:./memory-tool.db";
+	const authToken = process.env.LIBSQL_AUTH_TOKEN;
+
+	return {
+		url,
+		authToken,
+	};
 }