docs: add a page for spiders advanced usage

docs: update the titles for all files

docs(spider): add a new page for proxy management & blocking

docs(spiders): add a page to explain sessions logic

docs(spiders): add a new page for `requests & responses`

docs: use a better looking architecture image instead of mermaid

docs: add `getting started` page to the spiders section

docs: Improve spider architecture page

docs: simplify the architecture mermaid

docs: add the first page of the spiders section