Move new electrical_components module to the top-level

We can add the new name for electrical components keeping backwards
compatibility without the need for a new namespace, so we just move it
to the top-level `microgrid` package.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

RELEASE_NOTES.md

@@ -12,6 +12,7 @@ This release introduces the `v1alpha8` module to support a new API version.
 
 - Provide access to new API using new `v1alpha8` module.
 - Mapping for the new `Event` message has been added.
+- Add new common API enums for `ElectricalComponent` (previously `Components`).
 
 ## Bug Fixes