feat(sdk): pluginRoot officiel exposé dans activate(ctx) — #285 (src/runtime: champ pluginRoot = racine du package installé; docs activation-context/commands-and-feedback/services/manifest réécrits du constat d'absence vers le contrat d'usage officiel — runCommand reste project-scoped, pluginRoot utilisable dans command/args, substitution manifest ${pluginRoot}/${appDataDir} inchangée pour mcpServers; exemple hello-plugin: script packagé scripts/hello-task.mjs consommé via ctx.pluginRoot, packaging étendu; QA verte: npm run check — build, typecheck:examples, package:hello-plugin, artefact zip vérifié)

scripts/package-hello-plugin.mjs

@@ -9,12 +9,14 @@ const main = requireString(manifest, "main");
 const version = requireString(manifest, "version");
 const archivePath = join(pluginRoot, "build", `hello-plugin-${version}.zip`);
 const distEntries = await collectFiles(join(pluginRoot, "dist"), "dist");
+const scriptEntries = await collectFiles(join(pluginRoot, "scripts"), "scripts");
 if (!distEntries.some((entry) => entry.archivePath === main)) {
   throw new Error(`Built plugin dist does not contain manifest main: ${main}`);
 }
 const archiveEntries = [
   { archivePath: "idea-plugin.json", sourcePath: manifestPath },
   ...distEntries,
+  ...scriptEntries,
   { archivePath: "README.md", sourcePath: join(pluginRoot, "README.md") }
 ];
 const DOS_TIME_MIDNIGHT = 0;