Test to assert typescript typeshare bindings file is up to date

[binarybaron]

We should add a test to ensure the commited tauriMode.ts typeshare bindings file matches the one that would be generated by typeshare.

We could also consider not comitting tauriModel.ts to git at all.

[Einliterflasche]

while doing that we should probably execute the typeshare command in build.rs