refactor: drop projectOpts

[vicb]

In order to ease the merge with OpenNext, we should drop:

• projConfig
• `getConfig()'
• Config

opennextjs-cloudflare/packages/cloudflare/src/cli/build/index.ts

Lines 100 to 103 in df595ce

	const projConfig = getConfig(projectOpts);
	// TODO: rely on options only.
	await bundleServer(projConfig, options);

The configuration must be derived from Open Nextoptions