chore(create-novu-app): Update README with quickstart guide and release #255

Job	Run time
Dependency review	7s
Get Affected Packages	1m 33s
Find LaunchDarkly feature flags in diff	41s
Spell check	30s
Unit test internal novu lib packages	0s
Unit test @novu/providers	0s
Unit test @novu/* public NPM packages (except providers)	0s
Test E2E Web	0s
Test E2E Widget	0s
Unit Test	0s
Validate OpenAPI	0s
Test API (novu/api) / Check if the secret exists or not.	1s
Test API (novu/api-ee) / Check if the secret exists or not.	1s
Test API (novu/api-ee) / Test E2E	0s
Test API (novu/api) / Test E2E	0s
	2m 53s

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