chore: rewrite user-facing messages in Utilities module

Conservative cleanup of frappe.throw/msgprint messages per the message style
guide; meaning, severity, and .format() arguments are unchanged:

- index bare {} placeholders as {0}/{1}/... so translators can reorder
- move f-strings / .format() / concatenation out of _() (they break gettext
  extraction and never translate)
- wrap translatable dynamic values (DocType/Select labels) in _()
- fix grammar and colloquialisms
- drop no-op _() wrapping runtime-built strings

Part of #53976.

erpnext/utilities/__init__.py

@@ -48,7 +48,7 @@ def get_site_info(site_info):
 def payment_app_import_guard():
 	marketplace_link = '<a href="https://frappecloud.com/marketplace/apps/payments">Marketplace</a>'
 	github_link = '<a href="https://github.com/frappe/payments/">GitHub</a>'
-	msg = _("payments app is not installed. Please install it from {} or {}").format(
+	msg = _("payments app is not installed. Please install it from {0} or {1}").format(
 		marketplace_link, github_link
 	)
 	try:

erpnext/utilities/bulk_transaction.py

@@ -30,7 +30,7 @@ def transaction_processing(
 
 		skipped_msg += (
 			"<br><br><ul>"
-			+ "".join(_("<li>{}</li>").format(frappe.bold(row.get("name"))) for row in skipped_records)
+			+ "".join(_("<li>{0}</li>").format(frappe.bold(row.get("name"))) for row in skipped_records)
 			+ "</ul>"
 		)
 

erpnext/utilities/doctype/video_settings/video_settings.py

@@ -30,6 +30,8 @@ class VideoSettings(Document):
 			try:
 				build("youtube", "v3", developerKey=self.api_key)
 			except Exception:
-				title = _("Failed to Authenticate the API key.")
 				self.log_error("Failed to authenticate API key")
-				frappe.throw(title + " Please check the error logs.", title=_("Invalid Credentials"))
+				frappe.throw(
+					_("Failed to authenticate the API key. Please check the error logs."),
+					title=_("Invalid Credentials"),
+				)