setup vite and integrate fully with django

- vite starts with `python manage.py runserver`
- add templatetags to simply load vite hmr and entry points
- add eslint (recheck rules)
- enable non-strict ts

tsconfig.json

@@ -0,0 +1,19 @@
+{
+	"include": ["src/pretix/static/**/*", "src/pretix/static/**/*.vue"],
+	"compilerOptions": {
+		"baseUrl": ".",
+		"paths": {
+		},
+		"strict": false,
+		"allowJs": true,
+		"checkJs": true,
+		"target": "esnext",
+		"module": "esnext",
+		"moduleResolution": "bundler",
+		"resolveJsonModule": true,
+		"noErrorTruncation": true,
+		"noImplicitThis": true,
+		"isolatedModules": true,
+		"types": ["node", "events"]
+	}
+}