[mod] add i18n infrastructure for SearXNG message files (searxng.msg)

With this patch ``searxng.msg`` files can be added to SearXNG.  In
``searxng.msg`` files messages can be defined which are not captured by babel's
gettext, like the generic names of the categories or messages that are stored in
constants.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/babel.cfg b/babel.cfg
index 03bde6ca5..03913c256 100644
--- a/babel.cfg
+++ b/babel.cfg
@@ -1,4 +1,7 @@
+[extractors]
+searxng_msg = searx.babel_extract.extract
 [ignore: **/node_modules/**]
 [python: **.py]
 [jinja2: **/templates/**.html]
 extensions=jinja2.ext.autoescape,jinja2.ext.with_
+[searxng_msg: **/searxng.msg]