Create .pre-commit-config.yaml

[gbl186]

Added pre-commit configuration, which automatically checks file formatting before committing: removes extra spaces, checks the correctness of YAML files, and blocks accidental addition of large files to the repository.

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Note

Low Risk
Low risk: adds only developer tooling config with no runtime or application-logic impact.

Overview
Adds .pre-commit-config.yaml configuring pre-commit-hooks to enforce basic hygiene on commit (end-of-file-fixer, trailing-whitespace, check-yaml, and check-added-large-files).

^{Written by Cursor Bugbot for commit 1e52cbe. This will update automatically on new commits. Configure here.}