Move pages under tldr, lint run.sh, update docs

tldr/scrapy

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# scrapy
+
+> Web-crawling framework.
+> More information: <https://scrapy.org>.
+
+- Create a project:
+
+`scrapy startproject {{project_name}}`
+
+- Create a spider (in project directory):
+
+`scrapy genspider {{spider_name}} {{website_domain}}`
+
+- Edit spider (in project directory):
+
+`scrapy edit {{spider_name}}`
+
+- Run spider (in project directory):
+
+`scrapy crawl {{spider_name}}`
+
+- Fetch a webpage as Scrapy sees it and print the source to `stdout`:
+
+`scrapy fetch {{url}}`
+
+- Open a webpage in the default browser as Scrapy sees it (disable JavaScript for extra fidelity):
+
+`scrapy view {{url}}`
+
+- Open Scrapy shell for URL, which allows interaction with the page source in a Python shell (or IPython if available):
+
+`scrapy shell {{url}}`