Enhancement: Add {original_filename}, {added_time} to title placeholders (#4972)

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Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/usage.md

@@ -311,6 +311,8 @@ applied. You can use the following placeholders:
 - `{added_month_name}`: added month name
 - `{added_month_name_short}`: added month short name
 - `{added_day}`: added day
+- `{added_time}`: added time in HH:MM format
+- `{original_filename}`: original file name without extension
 
 ## Custom Fields {#custom-fields}