fix(scaffolding): rename create-ssp to create-frontend, fix 2 bugs it surfaced

Renamed scripts/create-ssp.mjs -> create-frontend.mjs (+ its WP-45 doc, npm
script, and every prose/command reference) since "ssp" reads as an acronym
where "create-frontend" says what it does.

Also fixes two real bugs found while running it for real during WP-61:
scripts/ci-local.sh was missing from RENAME_CONTENT_FILES (any --name'd
clone that keeps a backend would break `npm run ci`, still hardcoding
BigRegister.slnx), and plopfile.mjs's `gen:context` insertion into
.dependency-cruiser.js anchored on the `showcase: null,` line, which
create-ssp/create-frontend has already stripped by the time gen:context
runs in the same invocation — silently leaving a freshly scaffolded
context with no CONTEXT_ALLOWED fence entry at all. Re-anchored on the
`const CONTEXT_ALLOWED = {` line instead, which never moves.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/project/backlog/README.md

@@ -95,7 +95,7 @@ for its existing violations, so every WP ends green.
 | [WP-42](WP-42-privacy-security-showcase.md)            | Privacy & security showcase page (mask + no-PII log)                               | 8 · platform/DX/showcase    | done   |
 | [WP-43](WP-43-scaffold-generators.md)                  | Runnable generators: value-object / form-machine (plop; ui-component/bff = skills) | 8 · platform/DX/showcase    | done   |
 | [WP-44](WP-44-context-generator.md)                    | Runnable generator: `gen:context`                                                  | 8 · platform/DX/showcase    | done   |
-| [WP-45](WP-45-create-ssp-generator.md)                 | `create-ssp` bootstrap generator (mechanise new-ssp)                               | 8 · platform/DX/showcase    | done   |
+| [WP-45](WP-45-create-frontend-generator.md)            | `create-frontend` bootstrap generator (mechanise new-ssp)                          | 8 · platform/DX/showcase    | done   |
 | [WP-46](WP-46-vitest-coverage.md)                      | Vitest coverage (report + report-only thresholds)                                  | 8 · platform/DX/showcase    | done   |
 | [WP-47](WP-47-feature-flags.md)                        | Runtime feature flags (catalog-in-code, admin toggle, FE+backend)                  | 8 · platform/DX/showcase    | done   |
 | [WP-48](WP-48-stamdata-deletion-protection.md)         | Stamdata deletion protection (CI referential gate + editor expire/warn)            | 8 · platform/DX/showcase    | done   |
@@ -135,7 +135,7 @@ Phase 8 (platform/DX/showcase, WP-37..46): goal is BOTH a teaching showcase AND
 starter template. Priority: WP-37 (P0 quick fix) → WP-46 + WP-38 + WP-39 (P1, parallel) →
 WP-40 (P2) → WP-43 (P3) → WP-41 → WP-42 → WP-44 → WP-45 (P4). Ordering constraints:
 41 needs 40's PII kernel; 42 needs 40+41; 44 (`gen:context`) needs 38 (declarative boundaries
-make the generator simple) + 43; 45 (`create-ssp`) needs 43+44. 37/38/39/40/43/46 are otherwise
+make the generator simple) + 43; 45 (`create-frontend`) needs 43+44. 37/38/39/40/43/46 are otherwise
 independent. Two open tool forks, decided as step 1 of their WP: 38 dependency-cruiser vs Sheriff;
 43 plop vs Angular schematics.
 Phase 9 (OpenZaak/ZGW integration, WP-49..52) is strictly ordered 49 → 50 → 51 → 52: 49 lands