ci) add gitea actions and refresh readme (#1)

Summary:\n- replace scaffold README with project-specific setup, testing, Docker, and CI docs\n- add PR workflow to run lint, unit tests, app build, and Docker build\n- add main-branch workflow to build and push Docker images to Gitea registry\n\nNotes:\n- publish workflow expects REGISTRY_USERNAME and REGISTRY_PASSWORD repository secrets\n- image tags pushed: latest and short commit SHA\n\nTesting:\n- not run locally (workflows execute in Gitea Actions)
Reviewed-on: CampbellWireless/trips#1
Co-authored-by: Shaun Campbell <shaun@campbellwireless.net>
Co-committed-by: Shaun Campbell <shaun@campbellwireless.net>

tsconfig.json

@@ -1,6 +1,7 @@
 {
 	"extends": "./.svelte-kit/tsconfig.json",
 	"compilerOptions": {
+		"types": ["bun-types"],
 		"rewriteRelativeImportExtensions": true,
 		"allowJs": true,
 		"checkJs": true,