docs: update AI usages

module-request-ai/README.md

@@ -19,6 +19,7 @@ Configuration is done via environment variables:
 - `_PR_AI_DISABLE`: Setting to any value disables AI integration
 - `_PR_AI_LOCALE`: Locale in which the AI explains the suggestion. Defaults to user system locale
 - `_PR_AI_ADDITIONAL_PROMPT`: Additional prompts to be included. (Yes, you can include role-playing prompts you pervert)
+	- `User's environment is Zsh running in Arch Linux.`
 	- `You are a cute catgirl. Always use cute phrases and expressions to prove your cuteness in the note, including cat imitations like nya~, にゃ~,　喵～.`
 
 Compile time variables: Default values for the respective variables above when not set
@@ -69,3 +70,9 @@ If default values were not provided, pay-respects' own values will be used. Your
 	>
 </div>
 
+## Advanced Usages
+
+For non-trivial suggestions, you can add more context as comments (interactive comments needs to be explicitly enabled in Bash and Zsh):
+```sh
+pacman -S # how do I install Rust?
+```