Add Changelog and update documentation

Signed-off-by: Archana <archana.madhavan@silabs.com>
diff --git a/ChangeLog.d/Driver_wrapper_codegen_1.0.txt b/ChangeLog.d/Driver_wrapper_codegen_1.0.txt
new file mode 100644
index 0000000..8e97b01
--- /dev/null
+++ b/ChangeLog.d/Driver_wrapper_codegen_1.0.txt
@@ -0,0 +1,6 @@
+Features
+   * Add support for driver wrapper codegen 1.0. This autogenerates
+     the file library/psa_crypto_driver_wrappers.c. Rev 1.0 does not
+     support any additional templating. For further info on how to
+     patch into the psa_crypto_driver_wrappers.c refer
+     docs/proposed/psa-driver-wrappers-codegen-migration-guide.md