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

tldr/pip-install

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pip install
+
+> Install Python packages.
+> More information: <https://pip.pypa.io>.
+
+- Install a package:
+
+`pip install {{package}}`
+
+- Install a specific version of a package:
+
+`pip install {{package}}=={{version}}`
+
+- Install packages listed in a file:
+
+`pip install -r {{path/to/requirements.txt}}`
+
+- Install packages from an URL or local file archive (.tar.gz | .whl):
+
+`pip install --find-links {{url|path/to/file}}`
+
+- Install the local package in the current directory in develop (editable) mode:
+
+`pip install --editable {{.}}`