feat: Add basic key-value store example

- Added a client and server for a simple key-value store.
- Improved documentation with client and server usage examples.
- Created client and server implementations using the V language.

examples/data/ourdb_client.vsh

@@ -0,0 +1,23 @@
+#!/usr/bin/env -S v -n -w -gc none  -cc tcc -d use_openssl -enable-globals run
+
+// Please note that before running this script you need to run the server first
+// See examples/data/ourdb_server.vsh
+import freeflowuniverse.herolib.data.ourdb
+import os
+
+mut client := ourdb.new_client(
+	port: 3000
+	host: 'localhost'
+)!
+
+set := client.set('hello')!
+get := client.get(set.id)!
+
+assert set.id == get.id
+
+println('Set result: ${set}')
+println('Get result: ${get}')
+
+// test delete functionality
+
+client.delete(set.id)!