feat(linked chunk): add trait-based conversions between owned and borrowed linked chunk id

Signed-off-by: Michael Goldenberg <m@mgoldenberg.net>

crates/matrix-sdk-common/src/linked_chunk/mod.rs

@@ -134,6 +134,12 @@ impl LinkedChunkId<'_> {
     }
 }
 
+impl<'a> From<&'a OwnedLinkedChunkId> for LinkedChunkId<'a> {
+    fn from(value: &'a OwnedLinkedChunkId) -> Self {
+        value.as_ref()
+    }
+}
+
 impl PartialEq<&OwnedLinkedChunkId> for LinkedChunkId<'_> {
     fn eq(&self, other: &&OwnedLinkedChunkId) -> bool {
         match (self, other) {
@@ -189,6 +195,12 @@ impl OwnedLinkedChunkId {
     }
 }
 
+impl From<LinkedChunkId<'_>> for OwnedLinkedChunkId {
+    fn from(value: LinkedChunkId<'_>) -> Self {
+        value.to_owned()
+    }
+}
+
 /// Errors of [`LinkedChunk`].
 #[derive(thiserror::Error, Debug)]
 pub enum Error {