Fix list depth rendering in Obsidian markdown

[gabrielwithappy]

Overview

This PR fixes the issue where nested lists in Obsidian markdown documents don't render with correct depth levels.

Key Changes

1. Added New Section

• Added Nested Lists and Indentation section with clear guidance on TAB character usage
• Explains best practices for proper list depth rendering in Obsidian

2. Improved List Examples

• Replaced space indentation with TAB characters in all nested list examples
• Updated Unordered Lists and Task Lists examples
• Added clear comments indicating TAB usage

3. Table Formatting Improvements

• Applied consistent table separator styling
• Improved alignment for better readability

Technical Details

• Obsidian renders nested list depth based on TAB-based indentation
• Each TAB level represents one level of nesting
• This ensures consistent rendering across different editors and sync clients

Testing

• Converted space-indented lists to TAB-indented lists in the SKILL document
• Verified that nested lists now render correctly in Obsidian with proper depth levels
• Confirmed the changes display properly across different list types (unordered, ordered, task lists)