feat(defaultAppComponents): add custom 404 page

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Description

Please explain the changes you made here.

before:

after:

Which issue(s) does this PR fix

• Fixes https://issues.redhat.com/browse/RHIDP-1317

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

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@logonoff: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-tests	c2f34b5	link	true	/test e2e-tests

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[github-actions]

The image is available at:

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