docs: add skills, browser, and nodes documentation

docs: add comprehensive OpenClaw guide with official references

docs: move star chart to end of README

docs: add MIT license and star history chart

docs: add custom lobster logo SVG

docs: add feishu tools manual from yesterday's learning

docs: add feishu official plugin guide

fix: update logo URL

fix: move nested content to root directory

docs: update README with new structure

docs: add external resources and community links

docs: add practical cases from our experience

docs: add official documentation from docs.openclaw.ai

docs: enhance README with full structure

docs: add README with table of contents