fix: Correct typos (#19143)

Credit to `codespell`.

lib/extension/availability.ts

@@ -122,7 +122,7 @@ export default class Availability extends Extension {
     @bind private publishAvailabilityForAllEntities(): void {
         for (const entity of [...this.zigbee.devices(false), ...this.zigbee.groups()]) {
             if (utils.isAvailabilityEnabledForEntity(entity, settings.get())) {
-                // Publish initial availablility
+                // Publish initial availability
                 this.publishAvailability(entity, true, false, true);
 
                 if (entity.isDevice()) {

lib/extension/extension.ts

@@ -9,7 +9,7 @@ abstract class Extension {
     protected addExtension: (extension: Extension) => Promise<void>;
 
     /**
-     * Besides intializing variables, the constructor should do nothing!
+     * Besides initializing variables, the constructor should do nothing!
      *
      * @param {Zigbee} zigbee Zigbee controller
      * @param {MQTT} mqtt MQTT controller

lib/extension/homeassistant.ts

@@ -1103,7 +1103,7 @@ export default class HomeAssistant extends Extension {
                     for (const expose of exposes.filter((e) => groupSupportedTypes.includes(e.type))) {
                         let key = expose.type;
                         if (['switch', 'lock', 'cover'].includes(expose.type) && expose.endpoint) {
-                            // A device can have multiple of these types which have to discovered seperately.
+                            // A device can have multiple of these types which have to discovered separately.
                             // e.g. switch with property state and valve_detection.
                             const state = expose.features.find((f) => f.name === 'state');
                             key += featurePropertyWithoutEndpoint(state);

lib/util/settings.schema.json

@@ -449,7 +449,7 @@
           "type": "boolean",
           "title": "Legacy availability payload",
           "requiresRestart": true,
-          "description": "Payload to be used for device availabilty and bridge/state topics. true = text, false = JSON",
+          "description": "Payload to be used for device availability and bridge/state topics. true = text, false = JSON",
           "default": true
         },
         "log_rotation": {
@@ -912,7 +912,7 @@
           "title": "Group off state",
           "default": "auto",
           "requiresRestart": true,
-          "description": "Control when to publish state OFF for a group. 'all_members_off': only publish state OFF when all group memebers are in state OFF, 'last_member_state': publish state OFF whenever one of its members changes to OFF"
+          "description": "Control when to publish state OFF for a group. 'all_members_off': only publish state OFF when all group members are in state OFF, 'last_member_state': publish state OFF whenever one of its members changes to OFF"
         },
         "filtered_attributes": {
           "type": "array",