feat(settings): Allow moderators to set moderation languages

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2604>

api/funkwhale_api/moderation/dynamic_preferences_registry.py

@@ -1,3 +1,4 @@
+import pycountry
 from dynamic_preferences import types
 from dynamic_preferences.registries import global_preferences_registry
 from rest_framework import serializers
@@ -92,3 +93,18 @@ class SignupFormCustomization(common_preferences.SerializedPreference):
     required = False
     default = {}
     data_serializer_class = CustomFormSerializer
+
+
+@global_preferences_registry.register
+class Languages(common_preferences.StringListPreference):
+    show_in_api = True
+    section = moderation
+    name = "languages"
+    default = ["en"]
+    verbose_name = "Moderation languages"
+    help_text = (
+        "The language(s) spoken by the server moderator(s). Set this to inform users "
+        "what languages they should write reports and requests in."
+    )
+    choices = [(lang.alpha_3, lang.name) for lang in pycountry.languages]
+    field_kwargs = {"choices": choices, "required": False}

api/poetry.lock

@@ -2725,6 +2725,19 @@ files = [
     {file = "pycodestyle-2.7.0.tar.gz", hash = "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"},
 ]
 
+[[package]]
+name = "pycountry"
+version = "22.3.5"
+description = "ISO country, subdivision, language, currency and script definitions and their translations"
+optional = false
+python-versions = ">=3.6, <4"
+files = [
+    {file = "pycountry-22.3.5.tar.gz", hash = "sha256:b2163a246c585894d808f18783e19137cb70a0c18fb36748dc01fc6f109c1646"},
+]
+
+[package.dependencies]
+setuptools = "*"
+
 [[package]]
 name = "pycparser"
 version = "2.21"
@@ -4536,4 +4549,4 @@ typesense = ["typesense"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8,<3.12"
-content-hash = "89defcf9df569a1d3e2cdb50b29fd9161288dc88daa8c3e0e574ace88d196db2"
+content-hash = "5a259657d79f98ce6a7c377c5715aaf6f56d7ad4b9c420e784c81aa145c86b1d"

api/pyproject.toml

@@ -87,6 +87,7 @@ watchdog = "==2.2.1"
 troi = { git = "https://github.com/metabrainz/troi-recommendation-playground.git", tag = "v-2023-10-30.0"}
 lb-matching-tools = { git = "https://github.com/metabrainz/listenbrainz-matching-tools.git", branch = "main"}
 unidecode = "==1.3.6"
+pycountry = "22.3.5"
 
 # Typesense
 typesense = { version = "==0.15.1", optional = true }