Add templates for queries of type closest

nlmaps_tools/generate_nl.py

nlmaps_tools/nl_queries.txt

...ols/nl_templates/around_query_closest/latlong_give.jinja2

...ls/nl_templates/around_query_closest/latlong_where.jinja2

..._tools/nl_templates/around_query_closest/name_name.jinja2

..._tools/nl_templates/around_query_closest/name_what.jinja2

..._templates/around_query_closest/opening-hours_give.jinja2

...lates/around_query_closest/opening-hours_when_open.jinja2

...ates/around_query_closest/opening-hours_when_visit.jinja2

..._tools/nl_templates/common/opening-hours_when_open.jinja2