…yerIsAttacker flags

previously DefendCollect hid the attacked planet from attackers themselves (their
faction filtered out), so they only got a one-shot PwAttackingPlanet and no live
defender-count / deadline updates. now the matchmaker broadcasts every attacked
planet to every PW user and tags each option with two per-viewer bools so chobby
can render attacker/defender/spectator states off a single payload. no names or
rosters are added to the payload.

… (wired)

…ure types

Gate JoinPlanetAttack on having >=1 charge (when PwAttackChargesMax > 0
in DynamicConfig). Attackers spend 1 charge when their squad actually
launches (LaunchAllBattles), so merely clicking without forming a squad
does not cost anything. Defenders gain 1 charge at battle end (via
ProcessBattleResult). Passive recharge: a player who has sat below max
for PwAttackChargesRechargeMinutes gains 1 charge; fresh/zero-initialised
accounts get their recharge timer set lazily on the first passive pass.

PwCharges protocol message (Current, Max, SecondsUntilNextCharge) is
pushed to the player on login and after every change. Max=0 disables
the system. StartGalaxy seeds every account to the configured maximum.

Planetwars tweaks for next round

add per-player attack charges to planetwars

…ame/turn

Removing faction attacker concept from planetwars

… maximum + owner faction in API. fix #3043