chore: Clean up CONTRIBUTING.md and fix Makefile lint-smart syntax error

[jonpspri]

📌 Summary

This PR cleans up the CONTRIBUTING.md file by removing all FIXME annotations and providing proper references to existing documentation. It also fixes a bash syntax error in the Makefile's lint-smart target.

🔧 Changes

CONTRIBUTING.md

• Removed all FIXME annotations from links and sections
• Kept links pointing to upstream IBM repository as requested
• Updated Communication section to reference issue tracker
• Updated Setup section with references to README Quick Start and Installation sections
• Updated Testing section with reference to Bug-fix PR template and key test commands
• Updated Coding style guidelines with basic standards and reference to CLAUDE.md
• Fixed all markdown linting errors:
  • Added top-level # CONTRIBUTING header
  • Added language specifiers to code blocks (c, text, bash)
  • Added proper blank lines around all headings
  • Added blank lines around lists

Makefile

• Fixed bash syntax error on line 833 in lint-smart target (removed extra fi statement)

🧪 Verification

Check	Command	Status
Markdown linting	make lint CONTRIBUTING.md	✅ Pass
Makefile syntax	make lint-smart	✅ Pass

✅ Checklist

• All FIXME annotations removed
• Links verified and pointing to upstream repository
• Markdown linting passes with 0 errors
• Bash syntax error fixed
• Code formatted and committed with sign-off

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

This PR performs cleanup tasks on the CONTRIBUTING.md file and fixes a bash syntax error in the Makefile. The main purpose is to remove all FIXME annotations from the contributing guidelines and provide proper documentation references, while also addressing a syntax issue that was preventing the lint-smart target from executing correctly.

• Removed all FIXME annotations and replaced them with proper links and documentation references
• Fixed a bash syntax error in the Makefile's lint-smart target by removing an orphaned fi statement
• Added proper markdown formatting including headers, code block language specifiers, and spacing

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
Makefile	Removed orphaned fi statement that was causing bash syntax error in lint-smart target
CONTRIBUTING.md	Comprehensive cleanup removing FIXME annotations, adding proper documentation references, and fixing markdown formatting

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[crivetimihai]

Good catch, thanks!