WP Plugin Starter 1.0.0: a fresh start

The parts every wpallstars plugin needs: settings screen with search and an empty General tab, Read Me tab, features as classes, replaced plugins, the shared GitHub updater, release and check scripts, CI and the shared rules. scripts/rename-plugin.sh starts a new plugin; scripts/sync-core.sh keeps plugins' core files in step with this starter. Built with aidevops (https://aidevops.sh).

.github/pull_request_template.md

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+## What and why
+
+<!-- What changed, and the problem it solves. Link the issue: Resolves #123. -->
+
+## How it was tested
+
+<!-- The steps you took on a real WordPress site, and what you saw. -->
+
+- [ ] `scripts/lint.sh` passes.
+- [ ] Tested the changed feature on a WordPress site, with no new messages
+      mentioning `wpstarter` in `debug.log`.
+- [ ] WordPress 6.2 with PHP 7.4, if this uses a core function. <!-- or n/a -->
+- [ ] Kadence light and dark mode, if this changes front-end styles. <!-- or n/a -->
+
+## Checklist
+
+- [ ] Changelog lines in `README.md`, `changelog.txt` and `readme.txt`.
+- [ ] New options, post meta, transients or cron hooks are removed in `uninstall.php`.
+- [ ] New features are off by default.