Add Latvian language support (#6749)

* Add Latvian language support

* Add empty frontend translation

* Add messages.d.ts

InvenTree/InvenTree/locales.py

@@ -2,12 +2,14 @@
 
 If a new language translation is supported, it must be added here
 After adding a new language, run the following command:
+
 python manage.py makemessages -l <language_code> -e html,js,py --no-wrap
-where <language_code> is the code for the new language
+ - where <language_code> is the code for the new language
+
 Additionally, update the following files with the new locale code:
 
 - /src/frontend/.linguirc file
-- /src/frontend/src/context/LanguageContext.tsx
+- /src/frontend/src/contexts/LanguageContext.tsx
 """
 
 from django.utils.translation import gettext_lazy as _
@@ -30,6 +32,7 @@ LOCALES = [
     ('it', _('Italian')),
     ('ja', _('Japanese')),
     ('ko', _('Korean')),
+    ('lv', _('Latvian')),
     ('nl', _('Dutch')),
     ('no', _('Norwegian')),
     ('pl', _('Polish')),