Documentation: Optimize Karpor vs OpenLens vs K9s vs Dashboard Documentation

## What would you like to be added?
Optimize the documentation comparison between Karpor, OpenLens, K9s, and Dashboard. Focus on:

1. SEO optimization to improve search engine rankings
2. Highlighting key differentiators and market hot topics
3. Adding more graphs and clear headings for better readability

## Why is this needed?
This optimization will:

1. Improve Karpor visibility in search results
2. Help users quickly understand Karpor advantages
3. Increase organic traffic to Karpor documentation

SEO improvements will ensure that Karpor documentation is easily discoverable and ranks higher in search results

No documentation file, page, or test is named. Start by locating the existing comparison between Karpor, OpenLens, K9s, and Dashboard, then review its current headings, graphs, differentiators, and search-facing text. Done means the comparison has clearer structure, added visual material, and the requested SEO improvements.

Written by the indexing model from the issue text.