feat: basic behaviour for falling blocks

[IWareQ]

https://imgur.com/a/8Cgxanm

[codecov]

Codecov Report

Attention: Patch coverage is 20.17544% with 91 lines in your changes missing coverage. Please review.

Files	Coverage Δ	Complexity Δ
...llaymc/server/block/type/BlockTypeInitializer.java	99.83% <100.00%> (-0.02%)	14.00 <2.00> (-53.00)
...aymc/server/entity/type/EntityTypeInitializer.java	96.77% <100.00%> (+0.77%)	4.00 <1.00> (+1.00)
...tity/component/common/EntityBaseComponentImpl.java	15.95% <0.00%> (-0.31%)	11.00 <0.00> (ø)
...ock/component/sand/BlockSandBaseComponentImpl.java	22.22% <22.22%> (ø)	1.00 <1.00> (?)
...laymc/server/command/defaults/GameTestCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...mponent/common/BlockFallableBaseComponentImpl.java	6.66% <6.66%> (ø)	1.00 <1.00> (?)
...lingblock/EntityFallingBlockBaseComponentImpl.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)

... and 12 files with indirect coverage changes

[smartcmd]

Is this pr ready?

[IWareQ]

Is this pr ready?

basic functional - yes