chore: add translation for modai.global.text.context_prompt system setting

Author: theboxer

core/components/modai/lexicon/en/default.inc.php

@@ -37,6 +37,8 @@
 $_lang['setting_modai.global.text.model_desc'] = 'The default model for all prompts unless overridden per prompt.';
 $_lang['setting_modai.global.text.temperature'] = 'Default AI Temperature';
 $_lang['setting_modai.global.text.temperature_desc'] = 'Higher values like 0.8 will be more random and creative, while values lower than 0.2 will be more focused and deterministic.';
+$_lang['setting_modai.global.text.context_prompt'] = 'Context Prompt';
+$_lang['setting_modai.global.text.context_prompt_desc'] = 'Prompt that will be used when passing an additional context to the chat.';
 $_lang['setting_modai.global.vision.model'] = 'Vision Model';
 $_lang['setting_modai.global.vision.model_desc'] = 'Create text from image inputs. Valid options are o1, gpt-4o, gpt-4o-mini, and gpt-4-turbo.';
 $_lang['setting_modai.global.vision.prompt'] = 'Vision Prompt';