Fix preset alliance teams being randomised by draft-order shuffle

[nrkovacs]

Problem

Fixes #114. When the Alliance variant is used with Preset teams, the teams are randomised anyway unless "Use specified player order" is also enabled.

Cause

In GenerateDraft::generatePlayerData(), the player list is shuffled for random draft order (presetDraftOrder = false, the default) before alliance teams are assigned. Teams are then formed by pairing adjacent players in that already-shuffled list, so the preset pairs entered in the form are lost.

The two settings — presetDraftOrder (pick sequence) and allianceTeamMode (team composition) — were conflated. The existing itCanGeneratePlayerDataForAlliances test only passed because it set presetDraftOrder => true, which skips the shuffle and masked the bug.

Fix

• Capture the preset team-per-player mapping from the original input order before the draft-order shuffle, then re-apply it after players are created — so team composition stays fixed regardless of draft order.
• Random teams keep their existing adjacency-pairing behaviour (now shuffling a local copy rather than the associative $players array in place).

Test

Adds itKeepsPresetTeamsWhenDraftOrderIsRandomised, which runs with presetDraftOrder => false and asserts (across 20 shuffled runs) that each player keeps their preset team. This fails against the old code and passes with the fix.

Note: I wasn't able to run the PHPUnit suite locally in my environment, so a CI run / reviewer verification would be appreciated.

[shenanigans-be]

Thank you for the high quality PR!