feat: v1.0 — am registry : registre communautaire de catalogues (publication + recherche sur Gitea), manifeste source/version/auteur/sha256, installation avec validation du checksum et décision de confiance explicite (closes #77)

- src/registry.rs : Manifest (schema/name/version/author/source/agents_count/sha256), publish (écrit am-manifest.json + instructions git), search (multi-sources via settings.registry.sources), install (manifeste → catalogue → sha256 → source cohérente → confiance → register_include), list
- settings.registry {sources, author} + doc config.yaml ; CLI/REPL/help/man/i18n
- 11 tests : hash, manifest_url, publish (fichier + refus catalogue vide/sans source), E2E install tiny_http (refus sans confiance, enregistrement avec --yes, 4 requêtes), source mismatch

src/cli.rs

@@ -189,6 +189,9 @@ pub enum Command {
     Schedule(ScheduleCmd),
     /// List local models (ollama, llama.cpp, LM Studio) and prune unused ones
     Models(ModelsArgs),
+    /// Community registry (issue #77): publish, search and install agent
+    /// catalogs hosted on Gitea.
+    Registry(RegistryArgs),
     /// Manage remote catalogs: update the official one, add external ones
     #[command(subcommand)]
     Catalog(CatalogCmd),
@@ -628,6 +631,48 @@ pub struct LabArgs {
     pub list: bool,
 }
 
+/// Arguments of the registry command (issue #77).
+#[derive(Args, Debug, Clone, Default)]
+pub struct RegistryArgs {
+    #[command(subcommand)]
+    pub sub: Option<RegistryCmd>,
+}
+
+#[derive(Subcommand, Debug, Clone)]
+pub enum RegistryCmd {
+    /// Prepare a catalog + manifest (source, version, author, sha256) for
+    /// publication on Gitea
+    Publish {
+        /// Path of the catalog YAML file
+        catalog: PathBuf,
+        /// Public URL of the catalog once pushed (recorded in the manifest)
+        #[arg(long)]
+        source: Option<String>,
+        /// Author name recorded in the manifest
+        #[arg(long)]
+        author: Option<String>,
+        /// Catalog version (default 1.0.0)
+        #[arg(long)]
+        version: Option<String>,
+    },
+    /// Search agents across the registered sources (settings.registry.sources)
+    Search {
+        /// Free-form keyword (agent name, description or tag)
+        query: String,
+    },
+    /// Install a catalog from the registry: manifest + checksum validation,
+    /// then an explicit trust decision for unknown sources
+    Install {
+        /// Catalog URL
+        url: String,
+        /// Skip the trust confirmation
+        #[arg(long)]
+        yes: bool,
+    },
+    /// List the registered sources
+    List,
+}
+
 /// Arguments of the plugins command (issue #75).
 #[derive(Args, Debug, Clone, Default)]
 pub struct PluginsArgs {