[TASK] Rollback PR #33941 - Re-enable Web Components in Angular Project

[oidacra]

Description

Rollback changes from PR #33941 (Developer Onboarding Guide for Next.js with UVE) that disabled web components (CUSTOM_ELEMENTS_SCHEMA) in the Angular project. The web components functionality needs to be restored to maintain existing features that depend on custom elements.

Technology: Front-end (Angular)

Related PR: https://github.com/dotCMS/core/pull/33941/files#diff-1a0affc74f6fc0ee4974050e6f27346a47792f7dfe462c246d9d57791218655e

Acceptance Criteria

• Identify all changes in PR Create Developer Onboarding Guide for Next.js with UVE #33941 that disabled web components/CUSTOM_ELEMENTS_SCHEMA
• Revert the specific configuration changes that disabled web components
• Verify that existing features using custom elements work correctly after rollback
• Ensure no regression in functionality that depends on web components
• Update any affected tests to ensure they pass with web components re-enabled

Priority

High

Additional Context

The disabling of web components in the Angular project has impacted functionality that relies on custom elements. This rollback is necessary to restore that capability while preserving other improvements from the original PR if possible.