feat: Add OVHcloud AI Endpoints provider

[eliasto]

Description

This PR adds the OVHcloud AI Endpoints Inference Provider.

Documentation PR

strands-agents/docs#330

Type of Change

• New feature
• Documentation update

Testing

How have you tested the change? Yes 😄

• I ran hatch run prepare

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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