ci: add dylint check using perfectionist

[KSXGitHub]

No description provided.

[github-actions]

Performance Regression Reports

commit: 6538608

--quantity=apparent-size --max-depth=1 --min-ratio=0.01 --progress

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
pdu	112.8 ± 31.2	102.2	203.4	1.10 ± 0.31
pdu-0.20.0	102.3 ± 0.0	102.2	102.4	1.00

Logs

Benchmark 1: pdu
  Time (mean ± σ):     112.8 ms ±  31.2 ms    [User: 53.2 ms, System: 303.6 ms]
  Range (min … max):   102.2 ms … 203.4 ms    29 runs
 
  Warning: Statistical outliers were detected. Consider re-running this benchmark on a quiet system without any interferences from other programs. It might help to use the '--warmup' or '--prepare' options.
 
Benchmark 2: pdu-0.20.0
  Time (mean ± σ):     102.3 ms ±   0.0 ms    [User: 54.6 ms, System: 299.4 ms]
  Range (min … max):   102.2 ms … 102.4 ms    29 runs
 
Summary
  pdu-0.20.0 ran
    1.10 ± 0.31 times faster than pdu

JSON

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[Copilot]

Pull request overview

Adds a Dylint-based CI check (using the perfectionist lint set) and wires it into the project’s local/CI guidance so contributors can run the same linting flow.

Changes:

• Add DYLINT support to test.sh to optionally run cargo dylint.
• Introduce dylint.toml pinning the perfectionist dylint library by git revision.
• Add a dedicated GitHub Actions workflow for dylint, and update contributor / AI instruction docs to include DYLINT=true usage and setup.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
test.sh	Adds optional cargo dylint step gated by DYLINT.
dylint.toml	Declares the perfectionist dylint library (pinned rev).
.github/workflows/dylint.yaml	New CI job to run dylint via ./test.sh with DYLINT=true.
CONTRIBUTING.md	Documents installing dylint tooling and running DYLINT=true ./test.sh.
template/ai-instructions/shared.md	Updates shared AI quick-reference to include dylint tooling and DYLINT=true run.
CLAUDE.md	Mirrors shared AI instructions update for Claude.
AGENTS.md	Mirrors shared AI instructions update for agents.
.github/copilot-instructions.md	Mirrors shared AI instructions update for GitHub Copilot.