WIP: feat: add ovh gateway module

[Libr4rian]

No description provided.

[fredleger]

same as #85. Sync all OVH provider versions before merging

[Copilot]

Pull request overview

This PR introduces a new Terraform module for managing an OVH public cloud gateway, consistent with the existing OVH PCI module structure in this repository.

Changes:

• Adds a new ovh/gateway Terraform module with variables, provider configuration, main locals, and the OVH gateway resource.
• Exposes the created gateway’s ID via an output for use by consumers.
• Documents the new module in a README generated with terraform-docs (structure aligned with other OVH modules, though currently with some formatting issues).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
ovh/gateway/variables.tf	Defines common module inputs (name, customer, tags) plus gateway-specific inputs (cloud_project_id, model, region, network_uuid, subnet_id).
ovh/gateway/providers.tf	Declares required Terraform and provider versions for ovh and time to support the gateway resource and timestamping.
ovh/gateway/outputs.tf	Exposes the ovh_cloud_project_gateway.gateway.id so callers can reference the created gateway.
ovh/gateway/main.tf	Sets up shared local interpolated_tags and a time_static.last_update resource, mirroring tagging patterns in other OVH modules.
ovh/gateway/gateway.tf	Creates the ovh_cloud_project_gateway resource wired to the module inputs (project ID, model, region, network, subnet).
ovh/gateway/README.md	Adds user-facing documentation for the new gateway module (requirements, providers, inputs/outputs), currently with naming and markdown table formatting issues.

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[fredleger]

@Libr4rian @ffederighi I merged it considering the "WIP" was a relicate of previous work. Was i right ?