feat(P.3.7): lib-core.command v0.1.0 — initial release

Handle-Registry (get_pos + set_pos + speed callbacks) + lib-driven
auto-wire (bind_move_action + bind_target_provider) + per-frame
movement with arrive-snap. Move-only execution; context-dispatch
deferred to P.4.

See: meta/docs/superpowers/specs/2026-05-14-p3-7-lib-command-design.md

README.md

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+# lib-core.command — v0.1.0
+
+Move-Commands für registrierte Units. RTS-Style Click-to-Move (RMB → bewegt selected Units).
+
+## Quick Setup
+
+```lua
+local command   = require("lib-core.command")
+local input     = require("lib-core.input")
+local selection = require("lib-core.selection")   -- target-provider source
+
+input.bind("rmb", { "mouse_right" })
+
+command.bind_move_action("rmb")
+command.bind_target_provider(function() return selection.list() end)
+
+-- Register each movable unit (read+write callbacks + speed):
+local handle = command.register(
+    function() return { x = unit.x, y = unit.y } end,
+    function(nx, ny) unit.x = nx; unit.y = ny end,
+    100   -- px/s
+)
+
+-- per-frame:
+function update(ctx, dt)
+    command.update(dt)
+end
+```
+
+## API
+
+- Registry: `register(get_pos_fn, set_pos_fn, speed) → handle`, `unregister(h)`, `count_registered()`
+- Speed: `set_speed(h, n)` / `speed(h) → n`
+- Issue (programmatic): `move_to(handles, x, y)`, `cancel(h)`, `cancel_all()`
+- State-Query: `current(h) → {type, target_x, target_y}|nil`, `is_moving(h) → bool`
+- Bindings: `bind_move_action(name)`, `bind_target_provider(fn)`
+- Settings: `set_arrive_threshold(n)` / `arrive_threshold()`, `set_enabled(b)` / `enabled()`
+- Per-Frame: `update(dt)`
+
+See `meta/docs/superpowers/specs/2026-05-14-p3-7-lib-command-design.md` for full design.