Add make indent and enforce consistent code style

[jserv]

This introduces 'make indent' target that runs clang-format-20, shfmt, and black across the codebase. The shfmt flags (-i 4 -fn -ci -sr -bn) honor .editorconfig settings.

Change-Id: I008a57d2d335a5c866dffa10d3a1d9953906d7fe

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Summary by cubic

Adds make indent to auto-format C, shell, and Python with clang-format-20, shfmt, and black. Reformats the codebase for consistent style; no behavior changes.

• New Features
  • make indent runs clang-format-20 (version 20 required), shfmt (-i 4 -fn -ci -sr -bn), and black over project sources.
  • Adds .editorconfig to align shell formatting with shfmt.
  • Makefile validates clang-format version and locates tools before formatting.

^{Written for commit d17545c. Summary will update on new commits.}

[cubic-dev-ai]

1 issue found across 34 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="Makefile">

<violation number="1" location="Makefile:234">
P2: `ifndef CLANG_FORMAT` is ineffective here because `CLANG_FORMAT` is always defined (possibly empty). This bypasses the intended missing-tool check.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}