Sheet metal: sheet.perforate, a perforation field exported to the flat pattern and DXF (#732) (#1041)

Adds sheet.perforate: round holes on a staggered or square grid over the flat sheet, kept clear of edges, cut-outs and bend zones. The holes go to the flat pattern, the DXF and the measured volume rather than the B-rep, so a panel can carry many thousands of them.

assets/locales/de.json

@@ -542,6 +542,7 @@
   "cmd.sheet_fold": "Falten",
   "cmd.sheet_hem": "Umkantung",
   "cmd.sheet_manage_rules": "Blechregeln",
+  "cmd.sheet_perforate": "Perforieren",
   "cmd.sheet_refold": "Wieder falten",
   "cmd.sheet_rules": "Blechregeln auflisten",
   "cmd.sheet_unfold": "Entfalten",

assets/locales/en.json

@@ -161,6 +161,7 @@
   "cmd.sheet_fold": "Fold",
   "cmd.sheet_hem": "Hem",
   "cmd.sheet_manage_rules": "Sheet Metal Rules",
+  "cmd.sheet_perforate": "Perforate",
   "cmd.sheet_refold": "Refold",
   "cmd.sheet_rules": "List Sheet Metal Rules",
   "cmd.sheet_unfold": "Unfold",

assets/locales/ja.json

@@ -161,6 +161,7 @@
   "cmd.sheet_fold": "折り曲げ",
   "cmd.sheet_hem": "ヘミング",
   "cmd.sheet_manage_rules": "板金ルール",
+  "cmd.sheet_perforate": "パンチング",
   "cmd.sheet_refold": "折り戻し",
   "cmd.sheet_rules": "板金ルールを一覧表示",
   "cmd.sheet_unfold": "展開",

assets/locales/ko.json

@@ -542,6 +542,7 @@
   "cmd.sheet_fold": "접기",
   "cmd.sheet_hem": "헴",
   "cmd.sheet_manage_rules": "판금 규칙",
+  "cmd.sheet_perforate": "타공",
   "cmd.sheet_refold": "다시 접기",
   "cmd.sheet_rules": "판금 규칙 목록",
   "cmd.sheet_unfold": "펼치기",

assets/locales/zh.json

@@ -161,6 +161,7 @@
   "cmd.sheet_fold": "折叠",
   "cmd.sheet_hem": "卷边",
   "cmd.sheet_manage_rules": "钣金规则",
+  "cmd.sheet_perforate": "冲孔",
   "cmd.sheet_refold": "重新折弯",
   "cmd.sheet_rules": "列出钣金规则",
   "cmd.sheet_unfold": "展开",