Add Brick / Nether Brick Aliases

[erenkarakal]

Adds brick and nether brick aliases. The existing PR (#122) doesn't include nether bricks and doesn't match the Minecraft IDs

Previous behaviour:

brick = doesn't exist
bricks = "bricks banner pattern" - giving it to a player gives a brick block
nether brick = doesn't exist
nether bricks = "nether bricks or nether brick" - giving it to a player gives either item randomly
nether brickss = "nether brick" - item

New behaviour:

brick = "brick" - item
bricks = "bricks banner pattern" - giving it to a player gives a brick block
nether brick = "nether brick" - item
nether bricks = "nether bricks" - block
nether brickss = doesn't exist

This a quick patch, there is a bigger issue that needs to be fixed that will be discussed in a different issue.
With this PR, comparing type of {_block} to bricks doesn't work and is a known issue. The current workaround is comparing it to 1 bricks.

Related: SkriptLang/Skript#7484