Experimental push notification support (via NTFY)

[mgrimace]

This PR adds experimental push notification support via NTFY, closing FR #90

Summary of changes:

• users input NTFY server, topic, and optionally auth in the config.json, parsed using Config.ts
• Logger.ts matches [LOG], [ERROR], and [WARN] against customizable key words to generate notifications (with comments added to show where such customization can occur)
• Ntfy.sh sends customizable notifications using Axios.ts, which include emojis and prioritization based on type (e.g., high priority for warnings).
• Readme updated to briefly describe setup, and customization options.

By default, notifications are sent for each account: script started, 2FA/passwordless code, script successfully completed, and major warnings (e.g., searches not completed).

Huge thanks to @AariaX for fixing axios support for sending.

[AariaX]

Microsoft-Rewards-Script/src/index.ts

Line 100 in 2a1a90c

log('main', 'MAIN-WORKER', 'All workers destroyed. Exiting main process!', 'warn')

Changing this to "Completed tasks for ALL accounts" might be nice?

[mgrimace]

Microsoft-Rewards-Script/src/index.ts

Line 100 in 2a1a90c

log('main', 'MAIN-WORKER', 'All workers destroyed. Exiting main process!', 'warn')

Changing this to "Completed tasks for ALL accounts" might be nice?

I do get a [LOG] line that says 'completed tasks for ALL accounts' for each cluster/account = 2 notifications. I do personally prefer having it 'completed for email' instead so I could verify both completed.

If this change would generate one summary notification for all clusters that is beneficial. If it shows up as a [WARN] it would be easier to isolate from logs, but as a notification it might also (at a glance) look like there's a problem if it does show up with the warn tag.

Does all workers destroyed == tasks completed? Then there'd be no harm in changing it.