Phase 1 sub-commit 1: scaffold framework, skeleton, CI

Stands up the directory structure Phase 1 fills in over subsequent
sub-commits: framework/php (Composer package php-qml/bridge),
framework/qml (Qt module placeholder), framework/skeleton (Caddyfile +
Makefile stubs), and .gitea/workflows/ci.yml. Root .gitignore covers
the build/composer/Symfony/Qt/CMake/IDE artefacts the rest of Phase 1
will produce. No bundle code, no Qt module sources, no working dev mode
yet — those land in sub-commits 2-7. Spike still in place.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

framework/skeleton/Makefile

@@ -0,0 +1,23 @@
+# php-qml framework skeleton — Make targets.
+# Filled in across Phase 1 sub-commits 3, 6, and 7.
+
+.DEFAULT_GOAL := help
+
+.PHONY: help
+help: ## Show available targets
+	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "  %-12s %s\n", $$1, $$2}' $(MAKEFILE_LIST)
+
+.PHONY: dev
+dev: ## (TBD) Run the skeleton in dev mode (FrankenPHP --watch + Qt host)
+	@echo "dev: not yet implemented (Phase 1 sub-commit 6)"
+	@exit 1
+
+.PHONY: doctor
+doctor: ## (TBD) Run bridge:doctor against the running backend
+	@echo "doctor: not yet implemented (Phase 1 sub-commit 3)"
+	@exit 1
+
+.PHONY: quality
+quality: ## (TBD) Run PHPStan, php-cs-fixer (check), PHPUnit, qmllint
+	@echo "quality: not yet implemented (Phase 1 sub-commit 7)"
+	@exit 1