fix(inspect): support -f flag and {{.State.Running}} format

[gostop54]

Summary

Fixes two Docker CLI compatibility gaps in docker inspect:

1. Accept -f as alias for --format — Docker supports both, but the shim only accepted --format
2. Support {{.State.Running}} Go template — returns true/false based on container state

Motivation

OpenClaw (and likely other Docker-dependent tools) uses these patterns to check sandbox container state:

docker inspect -f '{{.State.Running}}' <container>

Without this fix, the shim rejects the -f flag entirely, causing container state detection to fail and tools to attempt duplicate container creation.

Changes

• cmd_inspect: -f now treated identically to --format
• cmd_inspect: {{.State.Running}} format renders true when container state is "running", false otherwise

Test

docker inspect -f '{{.State.Running}}' <container>
# => true

docker inspect --format '{{.State.Running}}' <stopped-container>
# => false

[benjipeng]

Thank you for the contribution. This fixes an important Docker inspect compatibility gap for OpenClaw. We will add broader inspect support in follow-up work.

[benjipeng]

Thanks again for the contribution. We expanded the inspect support into a broader generic implementation, and it is now available in v0.1.3.