refactor: remove unnecessary features, update docs

packages/react-charm/src/__tests__/useSignalState.spec.luau

@@ -0,0 +1,46 @@
+local Charm = require("../../Charm")
+local ReactCharm = require("../")
+local renderHook = require("./helpers/renderHook")
+local suite = require("../../../../test/suite")
+
+local test = suite.test
+
+test("tracks signal state", function()
+	local getState, setState = Charm.signal(0)
+	local hook = renderHook(function()
+		return ReactCharm.useSignalState(getState)
+	end)
+	assert(hook.result == 0, "should return 0")
+	setState(1)
+	assert(hook.result == 1, "should return 1")
+end)
+
+test("accepts a selector", function()
+	local getState, setState = Charm.signal(0)
+	local hook = renderHook(function()
+		return ReactCharm.useSignalState(function()
+			return 2 * getState()
+		end)
+	end)
+	assert(hook.result == 0, "should return 0")
+	setState(1)
+	assert(hook.result == 2, "should return 2")
+end)
+
+test("tracks dependencies", function()
+	local getState, setState = Charm.signal(0)
+	local hook = renderHook(function()
+		return ReactCharm.useSignalState(getState, { getState })
+	end)
+	assert(hook.result == 0, "should return 0")
+	setState(1)
+	assert(hook.result == 1, "should return 1")
+
+	getState, setState = Charm.signal(0)
+	hook.rerender()
+	assert(hook.result == 0, "should return 0")
+	setState(1)
+	assert(hook.result == 1, "should return 1")
+end)
+
+return {}