refactor(package): rename traits and switch dep maps to IndexMap

Rename Package/CompletePackage to PackageInterface/CompletePackageInterface
to mirror Composer's interface names, and split each into its own module
under crates/mozart-core/src/package/.

Switch dependency-link and metadata maps from BTreeMap to indexmap::IndexMap
so serialized JSON preserves the original key ordering rather than sorting
alphabetically — matching PHP associative-array semantics. The
--sort-packages behaviour in `require` is preserved via sort_unstable_keys.

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 6ce6158..50565a0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ colored = "3.1.1"
 dialoguer = "0.12.0"
 filetime = "0.2.27"
 flate2 = "1.1.9"
-indexmap = "2.14.0"
+indexmap = { version = "2.14.0", features = ["serde"] }
 md5 = "0.7.0"
 predicates = "3.1.4"
 proc-macro2 = "1.0.106"