feat: new cairo module

Resolves #105

Co-authored-by: A-Cloud-Ninja <5809177+A-Cloud-Ninja@users.noreply.github.com>

src/clients/lua.rs

@@ -0,0 +1,41 @@
+use mlua::Lua;
+use std::ops::Deref;
+use std::path::Path;
+use tracing::{debug, error};
+
+/// Wrapper around Lua instance
+/// to create a singleton and handle initialization.
+#[derive(Debug)]
+pub struct LuaEngine {
+    lua: Lua,
+}
+
+impl LuaEngine {
+    pub fn new(config_dir: &Path) -> Self {
+        let lua = unsafe { Lua::unsafe_new() };
+
+        let user_init = config_dir.join("init.lua");
+        if user_init.exists() {
+            debug!("loading user init script");
+
+            if let Err(err) = lua.load(user_init).exec() {
+                error!("{err:?}");
+            }
+        }
+
+        debug!("loading internal init script");
+        if let Err(err) = lua.load(include_str!("../../lua/init.lua")).exec() {
+            error!("{err:?}");
+        }
+
+        Self { lua }
+    }
+}
+
+impl Deref for LuaEngine {
+    type Target = Lua;
+
+    fn deref(&self) -> &Self::Target {
+        &self.lua
+    }
+}