fix: Fix command RemainArgNode default value type

[harry-xi]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ	Complexity Δ
...java/org/allaymc/api/command/tree/CommandNode.java	84.61% <ø> (ø)	52.00 <0.00> (ø)
...g/allaymc/api/command/tree/CommandNodeFactory.java	100.00% <ø> (ø)	2.00 <0.00> (ø)
...c/server/command/tree/AllayCommandNodeFactory.java	85.71% <ø> (ø)	24.00 <0.00> (ø)
...llaymc/server/command/tree/node/RemainArgNode.java	50.00% <ø> (ø)	3.00 <0.00> (ø)

... and 5 files with indirect coverage changes