setup: full dev pipeline — CI, lint-install, AGENTS.md

[parthalon025]

Summary

• Add CodeQL, MegaLinter, SonarCloud, Codety, release-please CI workflows
• Add lint-install advanced tier (ESLint/ruff/shellcheck/prettier/commitlint/husky/cspell)
• Add AGENTS.md, gitleaks.toml, session-start hook where missing
• Trim CLAUDE.md boilerplate (workspace-cascade pattern)

Test plan

• CI workflows render without syntax errors
• Pre-commit hook runs lint-staged cleanly
• Existing tests pass (if any)

🤖 Generated with Claude Code

[github-advanced-security]

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[github-actions]

🦙 MegaLinter status: ❌ ERROR

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	5		0	0	0.0s
❌ COPYPASTE	jscpd	yes		17	no	2914.07s
✅ EDITORCONFIG	editorconfig-checker	20		0	0	0.03s
❌ JAVASCRIPT	standard	2		1	0	1.32s
✅ JSON	jsonlint	5		0	0	0.18s
✅ JSON	npm-package-json-lint	yes		no	no	0.59s
✅ JSON	prettier	5		0	0	0.47s
✅ JSON	v8r	5		0	0	10.29s
⚠️ MARKDOWN	markdownlint	1		1	0	0.55s
✅ MARKDOWN	markdown-link-check	1		0	0	0.95s
⚠️ MARKDOWN	markdown-table-formatter	1		1	0	0.3s
❌ REPOSITORY	checkov	yes		6	no	23.97s
❌ REPOSITORY	gitleaks	yes		1	2	2.15s
✅ REPOSITORY	git_diff	yes		no	no	0.04s
✅ REPOSITORY	grype	yes		no	no	44.71s
❌ REPOSITORY	kics	yes		1	9	2.24s
✅ REPOSITORY	secretlint	yes		no	no	3.3s
✅ REPOSITORY	syft	yes		no	no	2.56s
✅ REPOSITORY	trivy	yes		no	no	12.61s
✅ REPOSITORY	trivy-sbom	yes		no	no	0.35s
✅ REPOSITORY	trufflehog	yes		no	no	4.92s
❌ SPELL	cspell	21		17	0	4.54s
❌ SPELL	lychee	12		1	0	3.93s
✅ YAML	prettier	6		0	0	0.5s
❌ YAML	v8r	6		1	0	5.51s
✅ YAML	yamllint	6		0	0	0.38s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff