Improve Pi Skill Formatting Consistency

[darshitpp]

This PR improves the formatting of the pi skill file to be consistent with other skill files in the repository.
Changes Made:

1. Enhanced YAML Metadata Formatting:

• Converted the single-line description to multi-line format with proper indentation
• Improved readability while maintaining all pi-specific content

2. Improved Procedure Steps Formatting:

• Added line breaks and indentation to procedure steps for better readability
• Steps now match the formatting style of other skill files

3. File Structure Fix:

• Added missing newline character at end of file for proper Unix text file convention

4. Documentation Update:

• Updated README to reflect the correct line count for pi/SKILL.md (now ~27 lines like other skills)
  Impact:
• No functional changes: All pi-specific content and functionality remains unchanged
• Consistency improvement: Pi skill now matches formatting of Claude, Cursor, Qwen, and other skill files
• Better readability: Multi-line formatting makes the skill easier to read and maintain
• Proper file termination: Added missing newline for Unix text file compliance
  Testing:
• Verified that all pi-specific content is preserved
• Confirmed line count now matches other skill files (27 lines each)
• Checked that the skill structure remains intact