feat: add user-defined command aliases via ~/.bernstein/aliases.yaml

[TheCodingDragon0]

Fixes #249

Extended the alias system to support user-defined aliases loaded from ~/.bernstein/aliases.yaml. User aliases override built-in ones. The �ernstein aliases command now shows whether each alias is built-in or user-defined.

Changes:

• Added _load_user_aliases() to load aliases from YAML
• Added _merge_aliases() called at module load time
• Updated �liases_cmd to show source column (built-in vs user)
• Graceful handling of missing/invalid YAML files

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• src/bernstein/cli/aliases.py

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_{Reviewed by grok-code-fast-1 · 93,256 tokens}

[chernistry]

Thanks! Same Pyright strict-mode issues as #264 since this touches the same aliases.py file:

1. Line 64 — yaml.safe_load() returns Any. Use data: object = yaml.safe_load(f) or {}
2. Line 67 — unknown k/v types. Narrow the dict first: raw = data if isinstance(data, dict) else {}
3. Line 76 — _USER_ALIASES uppercase = constant in Pyright. Rename to _user_aliases

See my review on #264 for full code snippets.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[chernistry]

Already merged as part of #264 — thanks!

[TheCodingDragon0]

Pushed the Pyright fixes — see commit b4326db. Same fix as #264. Sorry for the timing!