Allow anyone to react in read-only rooms

src/d2m/actions/create-room.js

@@ -146,6 +146,9 @@ async function channelToKState(channel, guild, di) {
 		/** @type {Ty.Event.M_Power_Levels} */
 		"m.room.power_levels/": {
 			events_default: everyoneCanSend ? 0 : 50,
+			events: {
+				"m.reaction": 0
+			},
 			notifications: {
 				room: everyoneCanMentionEveryone ? 0 : 20
 			},

src/d2m/actions/create-room.test.js

@@ -153,6 +153,9 @@ test("channel2room: read-only discord channel", async t => {
 		},
 		"m.room.power_levels/": {
 			events_default: 50, // <-- it should be read-only!
+			events: {
+				"m.reaction": 0
+			},
 			notifications: {
 				room: 20,
 			},

test/data.js

@@ -74,6 +74,9 @@ module.exports = {
 			},
 			"m.room.power_levels/": {
 				events_default: 0,
+				events: {
+					"m.reaction": 0
+				},
 				users: {
 					"@test_auto_invite:example.org": 100
 				},