This changes the output of `/catalog/search` as follows:
- Entire search query (rather than only the value of the `q` parameter)
is put in the <title> node.
- Search performed with an empty query presents itself as "All zims".
- The feed id remains stable for identical searches on the same
library.
The `common` name is from the time where kiwix was only one repository
for all the project (android, desktop, server...).
Now we have split the repositories and kiwix-lib is the "common" repo,
the "common" directory is somehow nonsense.
Matthieu Gautier
Veloman Yunkan