pub trait PromptProvider: Send + Sync {
    // Required methods
    fn list_prompts<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        cursor: Option<&'life1 str>,
        ctx: &'life2 RequestContext,
    ) -> Pin<Box<dyn Future<Output = Result<(Vec<Prompt>, Option<String>)>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
    fn get_prompt<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        name: &'life1 str,
        arguments: Option<HashMap<String, String>>,
        ctx: &'life2 RequestContext,
    ) -> Pin<Box<dyn Future<Output = Result<(Option<String>, Vec<PromptMessage>)>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
}Expand description
Trait for implementing prompt providers
Implement this trait to provide prompts (templates, instructions) to MCP clients. All methods receive a RequestContext with access to headers and request metadata.