feat: implement patient list and new patient form (E2.S1 & E2.S2)

Epic 2 - Cliëntenbeheer: Complete implementation of patient list with
search/filter functionality and comprehensive new patient form with
John Doe crisis admission support.

E2.S1 - Cliëntenlijst:
- Add client-side search bar with form submission
- Implement status filter dropdown (all/screening/active/finished/cancelled)
- Create StatusBadge component with color-coded status indicators
- Update table columns: Status, Name, BSN, Last Updated
- Add status filtering support to FHIR Patient API route
- Update FHIR patient transform to include episode-status extension
- Sort patients by updated_at descending (newest first)

E2.S2 - Nieuwe Cliënt Flow:
- Complete rewrite of patient form with all FO-required fields
- Implement John Doe checkbox with conditional BSN requirement
- Add BSN validation with Dutch Modulo-11 check algorithm
- Add comprehensive form fields:
  * Name fields: prefix, given name, family name
  * BSN with 9-digit pattern validation
  * Birth date with max date validation
  * Gender selection
  * Address: street, postal code, city
  * Contact: phone, email
  * Insurance: company, policy number
- Add warning messages for John Doe crisis admissions
- Set default episode status to 'planned' for all new patients
- Redirect to patient detail page after successful creation
- Update FHIR transform bidirectional insurance extension support:
  * dbPatientToFHIR: serialize insurance to JSON extension
  * fhirPatientToDB: parse insurance from JSON extension
- Pre-populate form fields when editing existing patients

Technical changes:
- app/api/fhir/Patient/route.ts: Add status query param and sorting
- app/epd/patients/actions.ts: Add status filter parameter
- app/epd/patients/page.tsx: Pass status searchParam
- app/epd/patients/components/patient-list.tsx: Complete UI rewrite
- app/epd/patients/components/patient-form.tsx: Complete form rewrite
- lib/fhir/transforms/patient.ts: Add insurance extension handling
- docs/specs/screening-intake/bouwplan-screening-intake-v1.0.md: Update status

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/epd/patients/actions.ts

@@ -16,6 +16,7 @@ const API_BASE_URL = process.env.NEXT_PUBLIC_APP_URL || 'http://localhost:3000';
  */
 export async function getPatients(filters?: {
   search?: string;
+  status?: string;
 }) {
   try {
     const url = new URL(`${API_BASE_URL}/api/fhir/Patient`);
@@ -24,6 +25,10 @@ export async function getPatients(filters?: {
       url.searchParams.set('name', filters.search);
     }
 
+    if (filters?.status) {
+      url.searchParams.set('status', filters.status);
+    }
+
     const response = await fetch(url.toString(), {
       cache: 'no-store',
     });