✨ feat(engine): mojeek for the search engine (#464)

* 🧑‍💻 fix: add closing curly brace in the nix build step

* ✨ feat: add code to provide search results from `mojeek` engine

---------

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

src/models/engine_models.rs

@@ -162,6 +162,10 @@ impl EngineHandler {
                     let engine = crate::engines::librex::LibreX::new()?;
                     ("librex", Box::new(engine))
                 }
+                "mojeek" => {
+                    let engine = crate::engines::mojeek::Mojeek::new()?;
+                    ("mojeek", Box::new(engine))
+                }
                 _ => {
                     return Err(Report::from(EngineError::NoSuchEngineFound(
                         engine_name.to_string(),