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>

The developer documentation contains a number of documents that are
duplicated from the wiki. Remove the duplications, ensuring the remaining
copies are up-to-date.

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

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

More of the guides still seem relevant and good information. Tweak the
formatting and move these to guides.

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