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

tldr/xzless

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# xzless
+
+> Display text from `xz` and `lzma` compressed files.
+> See also: `less`.
+> More information: <https://manned.org/xzless>.
+
+- View a compressed file:
+
+`xzless {{path/to/file}}`
+
+- View a compressed file and display line numbers:
+
+`xzless --LINE-NUMBERS {{path/to/file}}`
+
+- View a compressed file and quit if the entire file can be displayed on the first screen:
+
+`xzless --quit-if-one-screen {{path/to/file}}`