feat(tokens): add token count display to sidebar (#956)

* feat (tokens) add token count display to sidebar

* refactor: calculate the real tokens and reuse input hints to avoid occlusion

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Co-authored-by: yetone <yetoneful@gmail.com>

crates/avante-templates/src/lib.rs

@@ -18,7 +18,7 @@ impl<'a> State<'a> {
 #[derive(Debug, Serialize, Deserialize)]
 struct SelectedFile {
     path: String,
-    content: String,
+    content: Option<String>,
     file_type: String,
 }