Issue Description

The repository needs comprehensive tool configuration files to enable consistent code quality checks, security scanning, and development practices across all contributors and CI/CD pipelines. Without these configuration files, scripts and workflows cannot function properly.

Additional Context

Files to add:

• .cspell.json and .cspell/ dictionaries (spell checking)
• .markdownlint.json and .markdownlint-cli2.jsonc (markdown linting)
• .gitleaks.toml and .checkov.yaml (security scanning)
• scripts/linting/PSScriptAnalyzer.psd1 and markdown-link-check.config.json (linting configs)

Priority: Merge Priority 1 (Wave 1) - Can merge in parallel with other foundation PRs

Dependencies: None - independent issue

Research: .copilot-tracking/research/20251105-pr-grouping-strategy-research.md (Lines 435-464)