1.4.0-rc32: the Power Export Facility, the power rule, Ctrl+P and the Power window

[kramsey458]

Builds design/POWER-EXPORT-PLAN.md (#82) on rc31, as 1.4.0-rc32.

• Power Export Facility (Power tab; 20 gears, 20 planks, 20 logs a half; 200 science): two linked halves, one worker each, one power connection each. Send power to …, Charge my batteries first, Use my batteries for …. One way per pair of colonies, one to one, relays A → B → C, never a circle. Sends only what the other can use, after your own buildings. No trade at the building.
• Power rule: two colonies' power networks never join except through a facility (placement refusal with preview, and the game's network join guarded in separate colonies).
• Ctrl+P shows every colony's power (the road view's squares); H / top-right Power opens the Power window.
• Native panel modelled on the Trading Post's; English strings; TWO-COLONIES, README, site, changelog, version bump.
• Independent review: no desync risks found; its two logic findings (a paused half, batteries emptied into the partner's batteries) are fixed and tested.

Checks: both configurations 0 warnings; StabilityTests 558/558; RuntimeChecks 508/508 on both builds; water snapshots OK. Not played.

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