Add Documentation 3 (#353)

Add documentation that covers:

- Architecture
- Optimization (only empty template)
- Integration.

Add some PNG figures for architecture documentation including open document
format sources to enable document maintainance.

Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>

docs/akkudoktoreos/optimization.md

@@ -0,0 +1,8 @@
+% SPDX-License-Identifier: Apache-2.0
+
+# Optimization
+
+:::{admonition} Todo
+:class: note
+Describe optimization.
+:::