feat(power): Power1 стаб + dev-mock fake-ACC (feature dev-mocks)

PowerService (Power1, стаб running) + PowerMock (dev.PowerMock1, разделяет State через Arc<Mutex>).
dev-mocks — default-фича; прод (--no-default-features) mock не регистрирует.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: Alexander <akotenev2003@gmail.com>

crates/core/shturman-power/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "shturman-power"
+version = "0.0.0"
+edition.workspace = true
+license.workspace = true
+
+[features]
+# dev-mocks — вкл. в dev (fake-ACC для тестов/v0.3); прод выключает `--no-default-features`.
+default = ["dev-mocks"]
+dev-mocks = []
+
+[dependencies]
+shturman-ipc = { path = "../../shturman-ipc" }
+shturman-common = { path = "../../shturman-common" }
+zbus.workspace = true
+tokio.workspace = true
+anyhow.workspace = true
+tracing.workspace = true
+
+[dev-dependencies]
+tempfile.workspace = true
+shturman-sdk = { path = "../../shturman-sdk" }