chore(config): add FUNDING.yml, PULL_REQUEST_TEMPLATE, upstream‑wontport.txt, and .gitignore files

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,15 @@
+<!-- Heads-up before you publish: if you built this in a personalized fork
+     (your profile data, your market's job portals, another AI runtime),
+     note that GitHub points new PRs at the UPSTREAM repo by default.
+     Those adaptations live in forks - see CONTRIBUTING.md - and get
+     discovered via the pinned "Community forks & adaptations" discussion (#78).
+     Check the "base repository" dropdown above before you continue. -->
+
+## What changed and why
+
+## Failing case / reproduction (for fixes)
+
+## Verification
+<!-- What you ran, per CONTRIBUTING: python3 tools/lint_skills.py,
+     python3 tools/check_framework_version.py, bun test / bun run typecheck
+     in touched CLIs, python3 -m unittest discover -s tests -->