scripts: Add HTML build report script

This change adds a script to generate an HTML report, invoked via
west, providing a consolidated and user-friendly view of various build
artifacts and metrics. This includes footprint information (as both
tables and plots), configuration tracing, sys init levels, an interactive
devicetree browser, and more.

Signed-off-by: Graham Roff <grahamr@qti.qualcomm.com>

Author: grahamroff-dev

.gitignore

@@ -17,6 +17,7 @@
 build*/
 !doc/build/
 !scripts/build
+!scripts/buildreport
 !share/sysbuild/build
 !tests/drivers/build_all
 !scripts/pylib/build_helpers