fix: resolve mega-linter failure from invalid .editorconfig EOF/newline state

[Copilot]

The 🧹 Lint - mega-linter job failed on EDITORCONFIG_EDITORCONFIG_CHECKER due to .editorconfig not satisfying newline/line-ending requirements. This PR adds a compliant .editorconfig so the lint step can pass.

• Root-cause correction

  • Added a repository-level .editorconfig with valid LF endings and a required final newline.
  • Kept the change scoped to formatting policy only; no workflow or Go source logic changes.

• EditorConfig baseline

  • Declares cross-editor defaults (utf-8, lf, trailing whitespace trim, final newline).
  • Preserves language-specific indentation expectations for Go and YAML/JSON/Markdown.

root = true

[*]
charset = utf-8
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	6		0	0	0.43s
✅ ACTION	zizmor	6	0	0	0	1.99s
✅ COPYPASTE	jscpd	yes		no	no	0.96s
✅ EDITORCONFIG	editorconfig-checker	27		0	0	0.06s
✅ GO	golangci-lint	yes	yes	no	no	19.11s
✅ JSON	jsonlint	1		0	0	0.47s
✅ JSON	prettier	1	0	0	0	0.5s
✅ JSON	v8r	1		0	0	2.62s
✅ MARKDOWN	markdownlint	4	0	0	0	1.1s
✅ MARKDOWN	markdown-table-formatter	4	0	0	0	0.22s
✅ REPOSITORY	checkov	yes		no	no	26.65s
✅ REPOSITORY	gitleaks	yes		no	no	0.17s
✅ REPOSITORY	git_diff	yes		no	no	0.01s
✅ REPOSITORY	grype	yes		no	no	56.97s
✅ REPOSITORY	osv-scanner	yes		no	no	0.47s
✅ REPOSITORY	secretlint	yes		no	no	1.1s
✅ REPOSITORY	syft	yes		no	no	1.97s
✅ REPOSITORY	trivy	yes		no	no	12.72s
✅ REPOSITORY	trivy-sbom	yes		no	no	0.16s
✅ REPOSITORY	trufflehog	yes		no	no	3.54s
✅ SPELL	lychee	15		0	0	1.21s
✅ YAML	prettier	10	0	0	0	0.71s
✅ YAML	v8r	10		0	0	12.59s
✅ YAML	yamllint	10		0	0	0.94s

Notices

📣 MegaLinter 9.5.0 is out! Discover the new features and security recommendations in the release announcement. (Skip this info by defining SECURITY_SUGGESTIONS: false)

See detailed reports in MegaLinter artifacts

Show us your support by starring ⭐ the repository

[Copilot]

Pull request overview

This PR adds a repository-level .editorconfig intended to satisfy MegaLinter’s EDITORCONFIG_EDITORCONFIG_CHECKER requirements (LF line endings + final newline) and establish baseline formatting defaults across editors.

Changes:

• Added a root .editorconfig defining UTF-8, LF, trimming trailing whitespace, and requiring a final newline.
• Added language-specific indentation rules for Go and YAML/JSON/Markdown.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[devantler]

@copilot fix or exempt the remaining markdown lint issues:

.claude/skills/maintain/SKILL.md:5 error MD041/first-line-heading/first-line-h1 First line in a file should be a top-level heading [Context: "Perform maintenance per the **..."]
AGENTS.md:5:401 error MD013/line-length Line length [Expected: 400; Actual: 705]
AGENTS.md:31:401 error MD013/line-length Line length [Expected: 400; Actual: 1143]
CLAUDE.md:1 error MD041/first-line-heading/first-line-h1 First line in a file should be a top-level heading [Context: "@AGENTS.md"]

[Copilot]

@copilot fix or exempt the remaining markdown lint issues:

.claude/skills/maintain/SKILL.md:5 error MD041/first-line-heading/first-line-h1 First line in a file should be a top-level heading [Contex...

🤖 Generated by the Daily AI Assistant

Addressed in 0bc46e0.

• added top-level headings to CLAUDE.md and .claude/skills/maintain/SKILL.md
• wrapped the reported long lines in AGENTS.md
• added the required blank line before the task-menu list in AGENTS.md

Targeted markdownlint validation now passes for the requested rules on the affected files.