[1.16] Make blocks rotatable for structures

[SirEndii]

For further explanation, see #1082
Every block should now be rotatable for structures. If you see that I missed one, just tell me (:
I also updated forge so that it supports newer versions of java

I'll open a PR for 1.18 in the next days

[SirEndii]

Left is normal, right is rotated by 270°

[SquidDev]

Looks good, thank you very much! Just a couple of small nitpicks:

• We tend to use javax's Nonnull annotation instead of Jetbrain's one. JB's is probably better to use nowadays, but I do want to keep things consistent.
• Can you remove the p prefix from parameters? I think Parchment or ForgeGradle adds them in :/.

I assume these rotations only apply around the Y axis - we don't need to worry about a computer trying to face UP/DOWN?

Don't worry about 1.18 (unless it has changed massively!), as I can do that when merging things across.

[SirEndii]

I assume these rotations only apply around the Y axis - we don't need to worry about a computer trying to face UP/DOWN?

Computers shouldn't be able to rotate UP/DOWN
So I just hope this will never happen :P

• We tend to use javax's Nonnull annotation instead of Jetbrain's one. JB's is probably better to use nowadays, but I do want to keep things consistent.
• Can you remove the p prefix from parameters? I think Parchment or ForgeGradle adds them in :/.

Done (:

Don't worry about 1.18 (unless it has changed massively!), as I can do that when merging things across.

Kay!
Nothing changed in between 1.16 to 1.18

[SquidDev]

Thank you very much!