Add GAO as Enterprise partner

[kamonspecial]

Added description for GAO as an enterprise partner

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Important

Add GAO as a partner for Langfuse deployments in Japan & APAC in pages/enterprise.mdx.

• Partners:
  • Added GAO as a partner in Japan & APAC in pages/enterprise.mdx.
  • GAO provides professional services, technical support, and local currency payment options in Japan.
  • Updated partner introduction to include GAO for self-hosted/managed hosting inquiries.

^{This description was created by for d750e5b. It will automatically update as commits are pushed.}

[vercel]

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