feat: Add pest and pest_derive dependencies

Cargo.toml

@@ -64,6 +64,8 @@ uzers = "0.12.1"
 which = "8.0.0"
 xdg = "2.5.2"
 strip-ansi-escapes = "0.2.1"
+pest = "2.8.1"
+pest_derive = "2.8.1"
 
 [dev-dependencies]
 tempfile = "3.3.0"

src/filter_plugin/head.rs

@@ -48,16 +48,6 @@ impl FilterPlugin for HeadBytesFilter {
             }
         ]
     }
-    
-    fn options(&self) -> Vec<FilterOption> {
-        vec![
-            FilterOption {
-                name: "count".to_string(),
-                default: None,
-                required: true,
-            }
-        ]
-    }
 }
 
 pub struct HeadLinesFilter {