fix: replace hardcoded 'html' as template directory Template directory is now determined by loading the config file from the tracker home and using the template setting. Also fixed error message when polib import fails to indicate extraction is only from thml templates.

# human timezones
pytz
# indexer
Whoosh
# xapian is also installed
# extra database support
psycopg2
mysqlclient
redis
# encryption
gpg
# java web tokens
PyJWT
# extra HTTP compression methods
Brotli
zstd
# jinja2 template engine
Jinja2