langdetect offers slower and less accurate support for a smaller range of languages than langid.py

see e.g. pg 28 of https://aclanthology.org/P12-3005.pdf

proposal:

• replace langdetect dep with langid
• update garak/langproviders/base.py to match langid interface
• don't load this unless required (inside garak.langproviders.base.is_meaning_string())