Add support for Corentium Home 2 and Renew

[LaStrada]

Renew doesn't have batteries, so added a battery config as well.

[Copilot]

Pull request overview

Adds device metadata and service-selection logic to support additional Airthings models (Corentium Home 2 and Renew), including handling devices that do not report battery data.

Changes:

• Add new device serial prefixes (3250, 4100) and introduce a sensors.battery capability flag in AirthingsDeviceInfo.
• Only expose the HomeKit Battery service when the device is marked as having a battery and the user hasn’t disabled it.
• Update README supported-devices table to include the new models.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/plugin.ts	Gates Battery service exposure behind device.sensors.battery + existing batteryDisabled config.
src/device.ts	Adds battery capability to sensor metadata and new mappings for Corentium Home 2 / Renew prefixes.
README.md	Adds Corentium Home 2 and Renew to the supported devices table and fixes table formatting.

Comments suppressed due to low confidence (1)

src/device.ts:178

• In the default device mapping, sensors.battery is set to false, which means the Battery service will no longer be exposed for any unrecognized serial prefixes (even if the Airthings API returns batteryPercentage). Previously, battery was shown for all devices unless batteryDisabled was set. Consider defaulting battery to true for Unknown, or deriving battery support from API data so unknown-but-compatible devices don’t regress.

            return {
                model: 'Unknown',
                sensors: {
                    battery: false,
                    co2: false,
                    humidity: false,
                    mold: false,
                    pm1: false,
                    pm25: false,
                    pressure: false,
                    radonShortTermAvg: false,
                    temp: false,
                    voc: false
                }

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[michaelahern]

Thanks for the contribution @LaStrada!