fix: Support hiding builtin sensors

Add a show field on sensors to control hide/show, with the intention to
make this field support templates as well.

```yaml
- id: state
  show: false
```

src/main.ts

@@ -263,6 +263,7 @@ export default class SimpleThermostat extends LitElement {
           id: sensor?.id ?? String(index),
           label: sensor?.label,
           template: sensor.template,
+          show: sensor?.show !== false,
           entityId,
           context,
         } as PreparedSensor
@@ -360,16 +361,18 @@ export default class SimpleThermostat extends LitElement {
 
     let sensorsHtml
     if (this.config.version === 3) {
-      sensorsHtml = this.sensors.map((spec: PreparedSensor) => {
-        return renderTemplated({
-          ...spec,
-          variables: this.config.variables,
-          hass: this._hass,
-          config: this.config,
-          localize: this.localize,
-          openEntityPopover: this.openEntityPopover,
+      sensorsHtml = this.sensors
+        .filter((spec: PreparedSensor) => spec.show !== false)
+        .map((spec: PreparedSensor) => {
+          return renderTemplated({
+            ...spec,
+            variables: this.config.variables,
+            hass: this._hass,
+            config: this.config,
+            localize: this.localize,
+            openEntityPopover: this.openEntityPopover,
+          })
         })
-      })
       sensorsHtml = wrapSensors(this.config, sensorsHtml)
     } else {
       sensorsHtml = this.showSensors

src/types.ts

@@ -11,6 +11,7 @@ export interface ConfigSensor {
   unit?: string
   decimals?: number
   template?: string
+  show?: boolean
   type?: 'relativetime' | 'template'
 }
 
@@ -25,6 +26,7 @@ export interface PreparedSensor {
   label: string | false
   entityId: string
   template: string
+  show: boolean
   context: LooseObject
 }