Translate the whole repository to English

The kit is going public, so everything a reader sees is now English:
27 model sources, the core vocabulary, meta.ts (titles, descriptions and
every slider label), the viewer UI, all script output, REFERENCE.md and
the READMEs.

Rules applied: only comments, doc comments and human-facing strings were
touched. Identifiers, numbers, logic, registry item ids, part names and
material slot names are unchanged — those are a published contract and
were already English.

Verified rather than assumed: for all 53 changed .ts files the code
skeleton (source with comments stripped and string contents replaced by a
placeholder) is byte-identical before and after. Full gate is green —
typecheck, registry conformance, ~510 model checks, GLB round trip and a
production build.

Also fixed here:
- index.html and viewer.html were missed by the translation pass because
  the file list only covered .ts/.md/.css. Both had lang="tr" and Turkish
  titles.
- The viewer formatted triangle counts with toLocaleString('tr-TR'), which
  prints 15.425 rather than 15,425.
- REFERENCE.md's model table header did not match what
  scripts/catalog-table.ts emits, so the next regeneration would have
  silently changed it. Aligned to the generator.
- Removed scripts/probe.ts and scripts/zdiag.ts; they were throwaway
  diagnostics that got committed by accident.

my-registry/models/wooden-pitchfork/model.ts

@@ -1,12 +1,13 @@
 /**
  * @medieval-kit/wooden-pitchfork
  *
- * Yabayı uzaktan ayırt ettiren şey dişlerin arasındaki boşluk. O yüzden diş
- * sayısı ve açıklığı siluetin tamamını belirliyor.
+ * What tells a pitchfork apart from a distance is the gap between the tines.
+ * That is why the tine count and their spread decide the whole silhouette.
  *
- * İlk hâlimde dişler kare kesitli kutulardı ve hepsi birebir aynıydı. Gerçek
- * diş dövme ve yuvarlaktır, uca doğru sivrilir, ve hiçbiri komşusuyla tam aynı
- * açıda değildir. Üçü de burada düzeltildi.
+ * In my first version the tines were boxes of square section and every one of
+ * them was identical. A real tine is forged and round, it tapers towards the
+ * point, and none of them sits at exactly the same angle as its neighbour. All
+ * three were fixed here.
  */
 import { type BufferGeometry } from 'three'
 
@@ -27,11 +28,11 @@ import {
 export interface WoodenPitchforkConfig {
   readonly length: number
   readonly shaftRadius: number
-  /** Diş sayısı. */
+  /** Number of tines. */
   readonly tineCount: number
-  /** Dişlerin dışa açılması (radyan). */
+  /** How far the tines splay outwards (radians). */
   readonly spread: number
-  /** Diş uzunluğu, toplam boyun oranı olarak. */
+  /** Tine length, as a fraction of the total length. */
   readonly tineLength: number
   readonly seed: number
 }
@@ -69,7 +70,7 @@ export function createModel(overrides: Partial<WoodenPitchforkConfig> = {}) {
       const base = shaft.top + config.length * 0.006
       const pieces: BufferGeometry[] = []
 
-      // Enine dövme: dişleri sokete bağlayan yassı demir. Uçlara doğru inceliyor.
+      // Cross forging: flat iron tying the tines to the socket. Thins towards the ends.
       const crossWidth = config.shaftRadius * 2.6 * count
       pieces.push(chamferedBoxGeometry(
         [crossWidth, config.shaftRadius * 2],
@@ -82,26 +83,28 @@ export function createModel(overrides: Partial<WoodenPitchforkConfig> = {}) {
 
       for (let i = 0; i < count; i += 1) {
         const t = count === 1 ? 0 : (i / (count - 1)) * 2 - 1
-        // Diş KALIN olmalı. İlk hâlde yarıçap sapın yarısı kadardı, yani 1 cm;
-        // model uzaktan üç saç teli gibi görünüyordu. Gerçek yaba dişi 2–3 cm
-        // çapında dövme demirdir ve siluette sapın kendisi kadar yer kaplar.
+        // A tine must be THICK. In the first version the radius was half the
+        // shaft's, i.e. 1 cm, and from a distance the model looked like three
+        // hairs. A real pitchfork tine is forged iron 2–3 cm across and takes up
+        // as much of the silhouette as the shaft itself.
         const radius = config.shaftRadius * 0.88
         const profile: Level[] = [
           { y: 0, radius: radius * 1.2 },
           { y: tineSpan * 0.2, radius },
           { y: tineSpan * 0.66, radius: radius * 0.78 },
           { y: tineSpan * 0.9, radius: radius * 0.42 },
-          { y: tineSpan, radius: radius * 0.12 },  // sivri ama sıfır değil
+          { y: tineSpan, radius: radius * 0.12 },  // pointed but not zero
         ]
         const tine = latheGeometry(profile, 6, [0, 0, 0], steelTint(random, -0.05), {
           capTop: false,
           colourTop: steelTint(random, 0.05),
         })
-        // Kavis: düz bir diş teknik resim gibi duruyor. Gerçek yaba dişi öne
-        // doğru kıvrıktır — kaldırdığı samanı düşürmesin diye.
+        // Curve: a straight tine looks like a technical drawing. A real pitchfork
+        // tine is bent forward — so it does not drop the straw it has lifted.
         bendGeometry(tine, 0.42 / tineSpan + jitter(random, 0.06 / tineSpan))
-        // Her diş komşusundan biraz farklı açıda: dövme bir yaba kusursuz
-        // simetrik olmaz, ve bu tek detay onu "üretilmiş" olmaktan çıkarıyor.
+        // Each tine sits at a slightly different angle from its neighbour: a
+        // forged pitchfork is never perfectly symmetric, and this single detail
+        // stops it from looking "manufactured".
         tine.rotateZ(-t * config.spread + jitter(random, 0.02))
         tine.rotateX(jitter(random, 0.025))
         tine.translate(t * config.shaftRadius * 2.5, base + config.length * 0.008, 0)