Add HCL file extensions

[maximd]

Add HCL file extensions

HCL is used in Terraform which uses the .tf file extension but it is already handled by the terraform lexer. But HCL is also used by other Hashicorp tools like:

• Packer which uses the .pkr.hcl extension
• Vault which uses the .hcl extension
• Consul which uses the .hcl extension
• Waypoint which uses the waypoint.hcl file
• Nomad which uses the .nomad extension but also Nomad Packs which uses the .hcl extension

(in fact the list of HCL Schemas seems to be the most comprehensive list of HCL implementations)

[maximd]

Updated the PR because the .tf file extension is already handled by the terraform lexer.

[tancnle]

Thank you for your contribution @maximd 🙇🏼 The changes look good to me 👍🏼 🚀