Rename "vue3" to "vue"

[valpuia]

Since Inertia v2 drop support for vue2, I think it's the time to rename "vue3" to only "vue" for Inertia 3

Here is the attempt for v2 but not merge because of bc

What do you think?

[jefhar]

I would say to keep it as vue3. It clearly states which version of vue is required. If and when Vue v4 comes out, someone would need to write the vue4 code, then when vue3 is dropped, rename the vue4 back to vue if this precedent is set.

Just keep it simple.