fix: align TEMPLATE_SCAFFOLDING flag required to false; resync template

CI sync:template diff check caught two source/template drifts on 4ae1741:

1. lakebase manifest had been moved must -> should in the source, but the
   committed template still carried the rule under must. Resyncing now that
   sync:template is invoked as part of pnpm build.

2. TEMPLATE_SCAFFOLDING declared --template-dir and --config-dir as
   required: true, but the committed template had them as required: false
   (per MarioCadenas on PR #261 #6 — these flags aren't actually required
   by databricks apps init). Flipping the source constant to match; resync
   now produces consistent output.

After this commit, source and template are in lockstep; CI sync:template
diff check should pass.

Co-authored-by: Isaac
Signed-off-by: Atila Fassina <atila@fassina.eu>

Author: atilafassina

packages/shared/src/schemas/manifest.ts

@@ -1050,11 +1050,11 @@ export const TEMPLATE_SCAFFOLDING = {
   flags: {
     "--template-dir": {
       description: "Path to the template directory containing the app scaffold",
-      required: true,
+      required: false,
     },
     "--config-dir": {
       description: "Path to the output directory for the initialized app",
-      required: true,
+      required: false,
     },
     "--profile": {
       description: "Databricks CLI profile to use for authentication",