Shelved PR 257 extended onboarding cards

Shelved: PR #257 — extra first-spawn onboarding cards (commander / supply / EASA)

State: Ray-shelved 2026-07-03 (Build 89 pick round). PR #257 was closed without merging; nothing from it is in Build 88/89.

WHAT

Adds three optional extra onboarding cards to the existing first-spawn sequence: one explaining commanders and voting, one explaining supply runs, and one explaining aircraft re-arming via the EASA menu. They are opt-in and slot in after the existing WF-menu card; the default first-spawn sequence is unchanged unless the flag is enabled.

WHERE

• PR: #257 — "Lane 151: add optional extended onboarding cards".
• Branch / head commit: codex/151-onboarding-extended-cards @ ac701553ad402fa05fe8804b43719b4fe5be1f91.
• Flag (if any): WFBE_C_ONBOARDING_EXTENDED_CARDS = 0 (default-off; read inline via getVariable, so no shared-constants change).
• Files touched: Client/Functions/Common_Onboarding.sqf only, mirrored across Chernarus / Takistan / Zargabad.

WHY SHELVED

Ray, 2026-07-03, grouping this with sibling PR #394: "B87 cards + tips cover it." The Build 87 onboarding cards plus the rotating chat-tip feed already cover this material (commander, supply, EASA), so extra first-spawn cards are redundant.

Sibling #394 (contextual action-triggered hints) was shelved for the same reason in the same pick round.

HOW TO REVIVE

• Branch codex/151-onboarding-extended-cards @ ac701553ad402fa05fe8804b43719b4fe5be1f91 holds the three extra parseText cards behind WFBE_C_ONBOARDING_EXTENDED_CARDS.
• Design change needed: only revive if the current B87 cards + chat tips are judged to leave a real gap. If so, prefer folding any genuinely-missing card into the existing B87 onboarding set rather than re-adding a separate extended-cards flag.
• Touches a CLIENT file (Common_Onboarding.sqf), so revival must bump the mission pbo filename and repoint the cfg.
• Low-risk to reapply mechanically (text-only, single file), but content would need a refresh against whatever the B87 cards already say to avoid duplication.