add edge material if there are line elements

[jamesbradleym]

BACKGROUND:

• While working on https://github.com/hypar-io/Revit/pull/419 I found that edge materials would not be added unless drawEdges was flagged, which would set up edges on meshes. We don't necessarily want these two concepts entangled.

DESCRIPTION:

• Checks for line like elements and adds the edge material if they are present.

TESTING:

• Export a GLB with linework w/o drawEdges toggled. (such as exporting a family with model lines on this revit branch https://github.com/hypar-io/Revit/pull/419 using this elements branch.

FUTURE WORK:

• Is there any future work needed or anticipated? Does this PR create any obvious technical debt?

REQUIRED:

• All changes are up to date in CHANGELOG.md.

COMMENTS:

• Any other notes.

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This change is 

[wynged]

Reviewed 1 of 1 files at r1, all commit messages.
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