feat(typescript-sdk-examples): Adding some alert endpoint examples for sdkv4.0

[LukaFontanilla]

Examples Added:

• bulkDeleteAlerts (readme updated and prettier run): admin script to bulk delete alerts for a given user
• createSlackAlert (readme updated and prettier run): script to enable users to programmatically create an alert sent to slack based off of the default slack workspace connected

Developer Checklist ℹ️

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