BIM as a per-package kind; one project flows BIM -> construction

Replace the whole-project BIM 'mode' with an opt-in capability + a
per-package kind, so a single project can produce both model and
install packages (and install-only projects are unaffected).

SOP tool:
- Step 4 "Include BIM / VDC work packages" checkbox (state.bimEnabled).
  Enabling adds BIM package types + BIM release gates (flagged bim) plus
  BIM roles/sources/process steps alongside the construction defaults;
  disabling strips the bim-flagged items.
- Generated SOP carries bimEnabled and a per-type / per-constraint bim flag.
- Required sign-off role titles stay editable (no longer force-renamed).

Work Package Creator:
- Shows a Package Type selector (Install IWP / BIM EWP) only when the
  SOP has bimEnabled; kind is saved per package and labeled in the output.
- WP types and release gates are filtered by kind (BIM types+gates for
  EWP, install types+gates for IWP).
- EWP reveals the BIM Details card and hides controls.dev Assets /
  Materials / Kitting-MIMO; IWP shows those plus the "Enabled by - BIM
  package" traceability link.

Supersedes the earlier whole-project BIM mode.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

html/work-package-suite.html

@@ -158,6 +158,11 @@
           <div class="step" id="sop-step-4" style="display: none;">
             <h2>4. Work Package Types</h2>
             <div class="notice">Enable the WP types your project will use. Add any special rules and the roles required to approve WO completion.</div>
+            <label style="display:flex; align-items:flex-start; gap:0.6rem; padding:0.85rem 1rem; background:var(--bg); border:1px solid var(--border); border-radius:6px; margin:0 0 1rem; cursor:pointer;">
+              <input type="checkbox" id="bim_enabled" onchange="setBimEnabled(this.checked)" style="width:18px; height:18px; margin-top:2px; flex:none;">
+              <span><strong>Include BIM / VDC work packages on this project</strong><br>
+                <span style="color:var(--text-dim); font-size:12px;">Adds model/engineering package types &amp; release gates. In the Creator each package is then tagged <strong>Install (IWP)</strong> or <strong>BIM (EWP)</strong>, so the project can flow from BIM into construction. Leave off for install-only projects.</span></span>
+            </label>
             <div id="wp-types-table" style="margin-top: 1.5rem;"></div>
           </div>