sqf: S41 - Skip forEach that are assigned to a variable

[PabstMirror]

skips x = { _x + 1 } forEach [1, 2, 3];
not perfect, will miss forEachs going directly into commands and last statement in a code block,
but I think this should cover most of the actual times we use the return value of forEach

and the suggestion can then be suppressed by just assigning it to a var

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.6%. Comparing base (c61e0c0) to head (6bb5d57).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
libs/sqf/src/analyze/lints/s41_foreach_apply.rs	71.1% <100.0%> (+0.5%)	⬆️

... and 6 files with indirect coverage changes

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