chore(docs): delete obsolete bootstrap and prompt-template docs

Five files removed, all describing project states that no longer
apply post-WS-TOOLING-001:

- .cursor/instructions.md (8.4 KB): Phase 1-4 roadmap with all
  checkboxes empty; Phase 1 has been done for ~6 months. Broken
  'make portal' target. Content overlaps with CLAUDE.md.
- .cursor/ARCHITECTURE.md (18.9 KB): pre-WS-3 framing (dual SPA,
  dual cookies, dual SANCTUM_STATEFUL_DOMAINS) AND pre-Form-Builder
  schema (volunteer_profiles, public_forms with JSON fields). All
  six sections superseded by SCHEMA.md, AUTH_ARCHITECTURE.md,
  design-document.md, API.md, 102_multi_tenancy.mdc.
- dev-docs/MASTER_PROMPT_CC.md (13 KB): 'paste this above every task'
  workflow superseded by auto-loaded CLAUDE.md and structured
  Claude Chat-authored prompts. Stale dual-SPA + pre-Form-Builder
  assumptions throughout.
- dev-docs/MASTER_PROMPT_CURSOR.md (7.5 KB): same workflow obsoletion;
  Cursor is now IDE-only (Claude Code does all implementation).
  .cursor/rules/ system handles IDE-level guidance.
- dev-docs/dev-guide.md (32 KB): bootstrap-from-scratch document
  containing embedded snapshots of pre-Form-Builder CLAUDE.md,
  pre-Form-Builder SCHEMA.md, pre-Form-Builder API.md as
  copy-paste templates. Section 5 prompts pre-WS-TOOLING-001 era.
  Section 6 (agents) overlaps with CLAUDE_CODE_TOOLING.md.

Total: ~80 KB doc-rot removed.

Cross-reference check found four files outside the deleted set
referencing the deleted paths; all updated in the same commit:

- README.md: Documentation table rebuilt around CLAUDE.md +
  dev-docs/* (also dropped stale resources/design/ row pointing
  at a directory that no longer exists, and corrected docs/*
  paths to dev-docs/*)
- dev-docs/CLAUDE_DESKTOP_SETUP.md: dropped MASTER_PROMPT_CC,
  MASTER_PROMPT_CURSOR, dev-guide entries from the
  bewust-verwijderd exclusion list; updated Gerelateerd pointer
  from dev-guide.md -> SETUP.md
- dev-docs/ARCH-CONSOLIDATION-2026-04.md: updated future-distribution
  pointer from dev-guide.md -> SETUP.md (sprint briefing is
  historical so the change is purely doc-hygiene)
- dev-docs/VIBE_CODING_CHECKLIST.md: removed Dev guide row from
  the bestandspaden table

Remaining references in dev-docs/BACKLOG.md (lines 862-869) live
inside the TECH-DOCS-APPS-PORTAL-PURGE entry that closes in the
next commit.

Canonical replacements: dev-docs/SETUP.md (rewritten this PR),
CLAUDE.md, CLAUDE_CODE_TOOLING.md, and the ARCH-*.md series.

dev-docs/CLAUDE_DESKTOP_SETUP.md

@@ -111,11 +111,8 @@ start-guide.md
 SETUP.md
 SECURITY_AUDIT.md
 SCHEMA.md
-MASTER_PROMPT_CURSOR.md
-MASTER_PROMPT_CC.md
 form-builder-migration-playbook.md
 form-builder-getting-started.md
-dev-guide.md
 design-document.md
 COPY_CATALOGUE.md
 BACKLOG.md
@@ -169,4 +166,4 @@ subprocess-spawn (bij volgende tool call).
 ## Gerelateerd
 
 - `CLAUDE.md` (repo root) — instructies voor Claude Code, niet Claude Desktop
-- `dev-docs/dev-guide.md` — ontwikkelworkflow
+- `dev-docs/SETUP.md` — ontwikkelworkflow