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docs(blog,guide): add Lenovo and Hermes case studies (zh + en) (#1396)

## What
- Add blog post (zh + en) for Lenovo's cloud Agent sandbox migration
from Daytona to CubeSandbox, including the adapter layer strategy,
1.0→2.0 architecture evolution, and Volume/snapshot pitfalls.
- Add blog post (zh + en) for Hermes Agent running on CubeSandbox,
covering host-mount persistence, Skills layering, network allowlisting,
and TAP EBUSY issue (Issue #953).
- Add both cases to guide/usecases (zh + en) as new entries alongside
Lexmount AI.

## Notes
- Images compressed (w1400 q65): Hermes 1 image (122 KB), Lenovo 2
images (130 KB) per locale.
- Blog featured ordering: Lenovo → weight=1, Hermes → weight=2.
- Unfeatured InfoQ interview and Lexmount browser agent posts.
- New use case sidebar entries: "Hermes Agent" and "Lenovo Cloud Agent".

Signed-off-by: caoqianyun <594833623@qq.com>