[quickjs][oden][oden-js] Source maps

The worst support but it should cost very little if nobody is using
them (psst we're using them)

oden-js/src/atom.rs

@@ -2,6 +2,7 @@ use crate::{ContextRef, Runtime, ValueResult};
 use oden_js_sys as sys;
 use std::ops::Deref;
 
+#[derive(Eq, PartialEq, Debug, Hash)]
 pub struct AtomRef {
     pub(crate) atom: sys::JSAtom,
 }
@@ -39,6 +40,11 @@ impl Atom {
             rt: Runtime::from_raw(unsafe { sys::JS_GetRuntime(ctx.ctx) }),
         }
     }
+
+    pub(crate) fn consume(atom: Atom) -> u32 {
+        let atom = std::mem::ManuallyDrop::new(atom);
+        atom.atom.atom
+    }
 }
 
 impl Deref for Atom {
@@ -56,3 +62,17 @@ impl Drop for Atom {
         }
     }
 }
+
+impl PartialEq for Atom {
+    fn eq(&self, other: &Self) -> bool {
+        self.atom == other.atom
+    }
+}
+
+impl Eq for Atom {}
+
+impl std::hash::Hash for Atom {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        self.atom.hash(state)
+    }
+}