feat: support license caching (#634)

Adds support for license caching by storing the license obtained
from SERVER_UPGRADE_LICENSE message and sending
CLIENT_LICENSE_INFO if a license requested by the server is already
stored in the cache.

Co-authored-by: Benoît Cortier <3809077+CBenoit@users.noreply.github.com>

crates/ironrdp-web/src/session.rs

@@ -864,6 +864,8 @@ fn build_config(
         pointer_software_rendering: false,
         performance_flags: PerformanceFlags::default(),
         desktop_scale_factor: 0,
+        hardware_id: None,
+        license_cache: None,
     }
 }