Allow items to skip IDs

[silasary]

This is useful both for providing buffer space for future expansion (without shifting later IDs), and also just nice for organization reasons.

It's also an alternative to #73

[axxroytovu]

Can you add a syntax example to the Items.json file?

[nicopop]

1. this probably need to be added to the json schemas
2. might cause id issue down the line if an id is specified and later the automated count get counted up to it

[silasary]

1. this probably need to be added to the json schemas

Yup, can do.

2. might cause id issue down the line if an id is specified and later the automated count get counted up to it

This is why I throw an error if that happens.

[nicopop]

I dont think its as good as it could be since this wont allow the ID to go back at all but it should be good enough for now