Split README into topic documents

- README reduced to overview with linked document index
- docs/equipment/pressing-line.md: fleet strategy, Newbilt plan, site reqs
- docs/suppliers/vendor-landscape.md: researched vendor narratives
- docs/sustainability.md: solar, zero-discharge water, materials
- docs/worker-safety.md: training, clean rooms, PPE
- docs/facility-security.md: access control, CCTV, archive/audio protection,
  fire and life safety, plant monitoring, Thai compliance anchors

docs/worker-safety.md

@@ -0,0 +1,22 @@
+# Worker Safety
+
+Worker safety is a founding priority, on equal footing with the environmental
+commitments:
+
+- **Safety training**: proper, structured training for all operators and
+  maintenance staff, starting with the vendor-led commissioning training and
+  extending into an ongoing in-house program. The pressing line combines
+  hydraulics (~180 bar), saturated steam (10 bar / 180 °C), and hot PVC, and
+  every one of these demands trained, deliberate handling.
+- **Clean rooms for galvanics**: silvering and stamper electroforming will
+  run in dedicated clean rooms with controlled access, proper ventilation and
+  exhaust, and decontamination procedures for people and equipment leaving
+  the area. Plating chemistry stays inside its containment.
+- **Personal protective equipment**: appropriate PPE (overalls, gloves,
+  goggles, and process-specific protection) is mandatory per work area, in
+  line with the equipment vendor's site requirements (exhaust work benches,
+  fire protection) and local regulations.
+
+Safety infrastructure (training program, clean-room specification,
+decontamination workflow) will be planned alongside the equipment, not after
+it.