neo_doxygen: Document modules.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo_doxygen: Document implicit classes.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo_doxygen: Rename the `doc` module.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo_doxygen: Enable `JAVADOC_AUTOBRIEF` on Java tests.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo_doxygen: Add a class to manage brief descriptions.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo_doxygen: Add a section about brief descriptions in the `README`.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
html: Add missing documentation.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo_doxygen: Add an API to process description markup.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
Merge: neo_doxygen: Enhance description handling

* Document the implicit nodes.
* Prepare `DocListener` for translation of the Doxygen’s markup. #1059 must be fixed before we do anything else.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>

Pull-Request: #1060
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Alexandre Terrasa <alexandre@moz-code.org>