Fix text not appearing when requested font is not in font table

[DanRod1999]

Resolves
When a font is requested for text but it is not in the dgn_font table the text does not get displayed.

I believe it is due to the fontId being set to zero in itwinjs-core when the requested font is not found. Code here

Because of this when generating the opcodes for the geom stream, the invalid id is caught and the opcode for drawing a text view is not added to the Geom Stream io collection.

I do not know if this is the best solution, or if core should not use 0 for this fontId.

[markschlosseratbentley]

What does font id 0 mean? If we do not throw an error, and instead actually use font id 0 alongside the text opcode, have you seen what font it will use?

[markschlosseratbentley]

What does font id 0 mean? If we do not throw an error, and instead actually use font id 0 alongside the text opcode, have you seen what font it will use?

Never mind - I saw your other comment elsewhere about the fallback font it will use. Can we rely on this being the case always? (I hope so).

[pmconne]

See my comments on the issue. We don't want to allow people to insert text strings with font Id 0.