fix: Carry manifest field into generated index and west init instructions

Co-authored-by: thst-nordic <14976801+thst-nordic@users.noreply.github.com>

Author: Copilot

scripts/generate-index-json.ts

@@ -184,6 +184,7 @@ async function fetchRepoData(
             name: app.name,
             title: app.title,
             defaultBranch: app.defaultBranch ?? app.releases[0]?.tag,
+            manifest: app.manifest,
             kind: app.kind,
             license: app.license ?? 'Other License',
             apps: app.apps,

site/src/app/InstructionsDialog.tsx

@@ -44,6 +44,10 @@ function InstructionsDialog({ app, sha, close }: Props): JSX.Element {
                     <CodeBlock
                         text={`west init -m "${app.repo}" --mr ${
                             sha ?? '<latest tag>'
+                        }${
+                            app.manifest && app.manifest !== 'west.yml'
+                                ? ` --mf ${app.manifest}`
+                                : ''
                         }`}
                     />
                 </Step>