Replace OpenSCD fork with npm package imports

[noraeb]

Is your feature request related to a problem? Please describe.
As a maintainer of CoMPAS, I need to determine if we can resolve all imports in the current compas-open-scd that are pointing to the openscd folder, allowing us to potentially remove the OpenSCD fork dependency.

Describe the solution you'd like
Import open-scd through npm packages instead of maintaining a fork, and resolve all import statements to reference the npm package rather than local openscd folder paths.

Requirements

• Import open-scd through npm
• Attempt to resolve all imports pointing to openscd folder
• Document any imports that cannot be resolved and specify what needs to be done
• If this issue proves too complex to fix directly, create new issues for the remaining work
• Ultimate goal: Remove the fork from OpenSCD

Suggestions for a specific user interaction

Additional information
This is a technical debt reduction effort to simplify the dependency management in the CoMPAS project.

Test Files
N/A - Testing should verify that all functionality works correctly after switching from fork-based imports to npm package imports.

Acceptance Criteria

• All possible imports are resolved to use npm package
• Any unresolvable imports are documented with clear action items
• If complexity requires it, new issues are created for remaining work
• The OpenSCD fork dependency is removed from the project