This commit enables the generation and display of the ToC on all pages
where it's relevant due to the content size.

More pages could have been included but left aside due to inconsistent
use of heading levels leading to rendering/visual glitches.

The pages' content has not been modified, except for the "Terms of use"
page which included a manually-generated ToC.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>

Martyn Welch authored 4 years ago and Emanuele Aina committed 4 years ago

The system startup document is out of date. Provide a brief updated
description of the Apertis boot process and move to a new "architecture"
section. Split out the boot analysis into its own document and move to a
new "guides" section. Remove the previously performed optimisations as
these describe patched in changes that no longer appear to be a part
of Apertis.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>