Ivan/fix/doc codeblocks skip2

[leshy]

CI broken on prev PR #2043

[greptile-apps]

Greptile Summary

This PR fixes CI failures introduced by the previous PR (#2043) by adding the skip flag to documentation code blocks that can't execute in CI — blocks that reference hardware modules, placeholder imports, or would mutate the CI environment.

• nav_stack.md: Six python code blocks marked skip; these reference user-defined robot modules (from my_robot.control import MyRobotControl) or use ellipsis placeholders that would fail at runtime.
• g1/index.md: Two sh code blocks marked skip; one runs robot-on-board software and the other executes curl ... | sh to install tooling, both unsuitable for CI.
• visualization.md: Two python code blocks marked skip; they reference global_config.viewer which is undefined in block scope and a ModuleCoordinator loop that would block the runner.
• voxels.py: RST-style double-backtick inline-code markers removed from a Python comment; cosmetic change only.

Confidence Score: 5/5

Safe to merge — adds skip flags to documentation code blocks that cannot run in CI and makes a cosmetic comment tweak in a Python file.

All changes are targeted and mechanical: blocks that reference hardware, placeholder module imports, undefined variables, or environment-mutating shell commands are correctly flagged skip. No application logic is touched and no previously-passing blocks are being suppressed.

No files require special attention.

Important Files Changed

Filename	Overview
docs/capabilities/navigation/nav_stack.md	Six Python code blocks correctly marked skip; they contain placeholder imports or undefined variables that cannot execute in CI.
docs/platforms/humanoid/g1/index.md	Two shell code blocks marked skip; one runs robot-onboard software requiring hardware, the other invokes `curl
docs/usage/visualization.md	Two Python code blocks marked skip; one references global_config.viewer (undefined in block scope), the other calls .loop() which would block the CI runner indefinitely.
dimos/mapping/voxels.py	Cosmetic cleanup: RST double-backtick inline-code markers removed from a Python comment; no logic change.
docs/capabilities/navigation/readme.md	Trivial whitespace removal (blank line after heading); no functional change.

Sequence Diagram

sequenceDiagram
    participant PR as Pull Request
    participant GH as GitHub Actions
    participant BIN as bin/run-doc-codeblocks
    participant MB as md-babel-py

    PR->>GH: Push / synchronize
    GH->>BIN: /entrypoint.sh bash -c "./bin/run-doc-codeblocks --ci --no-cache"
    BIN->>MB: md-babel-py run --lang python,sh,node ./docs --recursive
    loop "Each code block in docs/**"
        MB->>MB: Check fence flags
        alt "flag == skip"
            MB-->>MB: Skip block (no execution)
        else no flag
            MB->>MB: Execute block
            alt Execution succeeds
                MB-->>BIN: OK
            else Execution fails
                MB-->>GH: CI FAILURE
            end
        end
    end
    BIN-->>GH: All blocks passed
    GH-->>PR: doc-codeblocks check green

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_{Reviews (2): Last reviewed commit: "checking if code change is required" | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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