Add docs for Terraform Provider

[Calm-Rock]

We recently made live the SigNoz Terraform provider which currently has the following ability:

• Auto Provisioning of alerts

We need to create a documentation telling the user how they can use this with an example and some screenshots.

Resources:

• SigNoz Terraform Docs - https://registry.terraform.io/providers/SigNoz/signoz/latest/docs
• SigNoz Terraform GitHub - https://github.com/SigNoz/terraform-provider-signoz/tree/main
• SigNoz Terraform GitHub alerts - https://github.com/SigNoz/terraform-provider-signoz/blob/main/docs/resources/alert.md
• Alerts documentation - https://signoz.io/docs/alerts/

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NOTE: _This issue is part of an assignment for the SigNoz Expert Contributors Program. Do not attempt/work on this issue if you haven't received an email for the assignment. _

[animeshd9]

@Calm-Rock I'll take up this issue

[prashant-shahi]

@Calm-Rock what's the status of this docs task? Has this been picked by someone?