feat: add role-specific config (#42)

Now we can set role temperature. For example:

```
- name: shell
  prompt: >
    I want you to act as a linux shell expert.
    I want you to answer only with bash code.
    Do not write explanations.
  temperature: 0.4
```

1 files changed, 5 insertions, 0 deletions

diff --git a/src/utils.rs b/src/utils.rs
index 76f2b8f..2c61f1c 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,4 +1,5 @@
 use chrono::prelude::*;
+use crossterm::style::{Color, Stylize};
 use std::io::{stdout, Write};
 
 #[macro_export]
@@ -17,3 +18,7 @@ pub fn now() -> String {
     let now = Local::now();
     now.to_rfc3339_opts(SecondsFormat::Secs, false)
 }
+
+pub fn emphasis(text: &str) -> String {
+    text.stylize().with(Color::White).to_string()
+}