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

tldr/osx/networkquality

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, osx]
+source: https://github.com/tldr-pages/tldr.git
+---
+# networkQuality
+
+> Measure the network quality by connecting to the internet.
+> More information: <https://support.apple.com/HT212313>.
+
+- Test the network quality for the default interface:
+
+`networkQuality`
+
+- Test the upload and download speeds sequentially instead of in parallel:
+
+`networkQuality -s`
+
+- Test a specified network interface:
+
+`networkQuality -I {{en0}}`
+
+- Test the network quality with verbose output:
+
+`networkQuality -v`