template-engine-copier skill: initial import

Copier + Jinja template-repository design skill: reference architecture,
implementation workflow, validation checklist, and a full worked example
template (questionnaire, extensions, resolvers, wrapper-first .scripts).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

example/.scripts/copier/Taskfile.yml

@@ -0,0 +1,9 @@
+version: "3"
+
+tasks:
+  bootstrap-one:
+    desc: -- --copier-force-copy "<true|false>" --copier-target-dir "<path>" --copier-params-file "<path>"
+    cmds:
+      - |
+        ./.scripts/copier/api/bootstrap-one.sh {{ .CLI_ARGS }}
+    silent: true