Master talents: experience, points and four branches (Builder, Warlord, Warlock, Merchant) with a toolbar window

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/ROADMAP.md

@@ -129,7 +129,10 @@ grid), guard and attack markers (shields and swords), savegames with the game st
    to the gate; slain, his loot is yours; from wave 3), monk (spells do not touch him, 5), ranger (shoots, lays
    snares that hurt and stun a creature, 7), inquisitor (fragile, every 20 s turns a nearby kobold or spider to
    the heroes, 9). In the campaign from missions 5, 9, 12 and 16 on.
-4. **Master talents** - Builder, Warlord, Warlock, Merchant (5 levels each), a toolbar button; per game,
-   carried over in the campaign.
+4. **Master talents** (done, v202611-00064, talents.rs) - experience from slain heroes, digging, rooms, walls,
+   traps, towers, spells and gold; points get dearer (300, 450, 600 ...). Builder (imps dig +10%, rooms -6% per
+   level), Warlord (creatures +5% damage, -5% damage taken), Warlock (mana +15%, spells -6%), Merchant (wages
+   -6%, treasure +6%); 5 levels each. The "Master" button (number of free points, pulsing) opens the window.
+   AI masters spend their points themselves; per game, carried over in the campaign and co-op runs.
 5. **Weather above ground** - rain (puts out fire), fog (less sight), storms (lightning in trees and units).
 6. **Named creatures** - names per kind and language, epithets at higher levels, memorial stones.