fix(suggests): align with Composer's SuggestsCommand pipeline

Port `Composer\Installer\SuggestedPackagesReporter` to
`mozart_core::installer` (modes, add_package, add_suggestions_from_package,
output, output_minimalistic, escape_output) and slim
`commands/suggests.rs` to mirror `SuggestsCommand::execute`. Defines
`HasSuggests`, `InstalledRepoLite`, `RootInfo` as the minimal stand-ins
for Composer's `PackageInterface` / `InstalledRepository` /
`onlyDependentsOf`.

Also fixes a latent bug where `provide`/`replace` virtuals were read
from `extra_fields` (always empty after a serde round-trip into
LockedPackage's typed fields) and moves the "additional suggestions
... --all" hint to fire after the rendered sections, matching
Composer's order.

1 files changed, 19 insertions, 0 deletions

diff --git a/crates/mozart-registry/src/installed.rs b/crates/mozart-registry/src/installed.rs
index da02c6a..108b844 100644
--- a/crates/mozart-registry/src/installed.rs
+++ b/crates/mozart-registry/src/installed.rs
@@ -1,3 +1,4 @@
+use mozart_core::installer::HasSuggests;
 use mozart_core::package::to_json_pretty;
 use serde::{Deserialize, Serialize};
 use std::collections::BTreeMap;
@@ -58,6 +59,24 @@ pub struct InstalledPackageEntry {
     pub extra_fields: BTreeMap<String, serde_json::Value>,
 }
 
+impl HasSuggests for InstalledPackageEntry {
+    fn pretty_name(&self) -> &str {
+        &self.name
+    }
+
+    fn suggests(&self) -> Vec<(String, String)> {
+        let Some(val) = self.extra_fields.get("suggest") else {
+            return Vec::new();
+        };
+        let Some(obj) = val.as_object() else {
+            return Vec::new();
+        };
+        obj.iter()
+            .filter_map(|(target, reason)| reason.as_str().map(|r| (target.clone(), r.to_string())))
+            .collect()
+    }
+}
+
 impl Default for InstalledPackages {
     fn default() -> Self {
         Self::new()