feat: support Terraform code review

[lintaonz]

Support HashiCorp Terraform code review:

• .tf: Terraform file
• .hcl: HashiCorp Configuration Language

I have tested both file extensions with the 'gpt-3.5-turbo' model. It works great.

Example

Risk Level 3 - variables.tf

The code changes in this file have a medium risk to the code base. Here are a few suggestions for improvement:

1. The enabled variable can have a more descriptive name. Consider renaming it to something like diagnosticsEnabled.

2. The diag_object variable can be defined as a complex object type to improve readability and maintainability. Consider using a map or a struct to define the structure of the diag_object variable.

Example:

variable \"diag_object\" {
  description = \"(Required) Contains the diagnostics setting object.\"
  type        = map(object({
    diagnosticsEnabled = bool
    retentionEnabled   = bool
    retentionPeriod    = number
  }))
}