uefi-raw: net: improve convenience of net types + doc

This streamlines the integration with core::net
types but also the general usage of uefi_raw::net types.

Author: phip1611

uefi-raw/CHANGELOG.md

@@ -5,6 +5,11 @@
 - Added `PciRootBridgeIoProtocol`.
 - Added `ConfigKeywordHandlerProtocol`.
 - Added `HiiConfigAccessProtocol`.
+- Added lots of convenient methods and `From` implementations to better
+  integrate the net types (`MacAddress`, `IpAddress`, `Ipv4Address`,
+  `Ipv6Address`) with the types from `core::net::*` plus some other convenient
+  `From` transformations. Look into the documentation of the types for further
+  guidance.
 
 ## Changed
 - The documentation for UEFI protocols has been streamlined and improved.