Add bootapi-templates repository

bootapi-templates holds the live kickstart/iPXE templates and the distro catalog
that bootapi pulls via git-sync (every ~3m, like argocd), so template/OS changes
ship without rebuilding bootapi. Its CI validates that every template parses and
renders for every catalog distro (via 'bootapi validate') plus shellcheck on the
%post snippets.

Modeled on the bootapi repo entry: public, squash, delete-branch-after-merge,
main protection requiring the pre-commit + validate Woodpecker checks and benvin
approval.

Claude-Session: https://claude.ai/code/session_015ur3i7D2azsMAWTSVABApv

config/git.unkin.net/unkin/repository/bootapi-templates.yaml

@@ -0,0 +1,13 @@
+description: "Live kickstart/iPXE templates + distro catalog for bootapi. Pulled by bootapi via git-sync; CI validates templates render for every distro."
+private: false
+default_branch: "main"
+default_delete_branch_after_merge: true
+default_merge_style: "squash"
+branch_protection:
+  - rule_name: "main"
+    enable_push: false
+    status_check_contexts:
+      - "ci/woodpecker/pr/pre-commit"
+      - "ci/woodpecker/pr/validate"
+    approval_whitelist_users:
+      - "benvin"