feat: 404 and catchall handling

[adamdbradley]

Breaking Change

• trailingSlash defaults to true now, previously defaulted to false

404 Handling

• Add ability to create custom 404.tsx
• Starting at the original request path, use the first custom 404 found, and climb up the directories until one is found
• Use a default 404.html if no custom 404.tsx
• Generate static 404 content that can be used in any edge function or node server

Route Handling

• Check if path is a known static file before routing to SSR
• Create catchall routes at the edge function level
• Ability to also manually add staticPaths to the known paths
• Do not create any static index.html files that should be handled by SSR

E2E Tests

• Fix qwik-city e2e tests with updated trailing slash default

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