feat: add built_against field for ABI-sensitive dependencies

- Introduced a new field `built_against` in the InstalledPackageRecord struct to track concrete package names for ABI-sensitive dependencies.
- Updated database schema to include `built_against` column in the packages table.
- Modified package registration and listing functions to handle the new `built_against` field.
- Implemented helper functions to format and parse the `built_against` data.
- Enhanced tests to verify the correct handling of the `built_against` metadata during package registration and retrieval.
- Updated resolver logic to utilize `built_against` for dependency resolution.

src/package/spec/tests.rs

@@ -40,6 +40,37 @@ type = "custom"
     assert_eq!(spec.spec_dir, tmp.path());
 }
 
+#[test]
+fn parse_package_built_against_metadata() {
+    let tmp = tempfile::tempdir().unwrap();
+    let path = tmp.path().join("pkg.toml");
+
+    std::fs::write(
+        &path,
+        r#"
+[package]
+name = "foo"
+version = "1.0"
+description = "d"
+homepage = "h"
+license = "MIT"
+built-against = ["icu78"]
+
+[source]
+url = "https://example.com/foo.tar.gz"
+sha256 = "skip"
+extract_dir = "foo"
+
+[build]
+type = "custom"
+"#,
+    )
+    .unwrap();
+
+    let spec = PackageSpec::from_file(&path).unwrap();
+    assert_eq!(spec.package.built_against, vec!["icu78".to_string()]);
+}
+
 #[test]
 fn parse_source_array() {
     let tmp = tempfile::tempdir().unwrap();
@@ -2358,6 +2389,7 @@ fn mk_spec(name: &str, version: &str) -> PackageSpec {
             description: "d".into(),
             homepage: "h".into(),
             abi_breaking: false,
+            built_against: Vec::new(),
             license: vec!["MIT".into()],
         },
         packages: Vec::new(),