Update dependencies and refactor SHA256 hash encoding

- Updated `crossterm` from version 0.28 to 0.29.
- Upgraded `reqwest` from version 0.12 to 0.13 and added "form" feature.
- Bumped `serde_yaml_ng` from version 0.9 to 0.10.
- Increased `dirs` version from 5 to 6.
- Updated `rusqlite` from version 0.32 to 0.40.
- Upgraded `infer` from version 0.16 to 0.19.
- Bumped `sha2` from version 0.10 to 0.11.
- Updated `rmcp` from version 1.8 to 2.2.
- Refactored SHA256 hash encoding in `rewind.rs`, `mod.rs`, and `rest.rs` to use `hex::encode` instead of formatting with `{:x}` for better clarity and consistency.

src/app/state/rest.rs

@@ -132,7 +132,7 @@ impl AppStateRest {
                 use sha2::Digest;
                 let mut hasher = sha2::Sha256::new();
                 hasher.update(abs_root.to_string_lossy().as_bytes());
-                let hash_hex = format!("{:x}", hasher.finalize());
+                let hash_hex = hex::encode(hasher.finalize());
                 let folder_name = abs_root.file_name().map_or_else(|| "root".to_string(), |n| n.to_string_lossy().to_string());
                 let history_filename = format!("{}-{}.txt", folder_name, &hash_hex[..8]);
                 let history_dir = base_dir.join("history");