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

tldr/linux/mkswap

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mkswap
+
+> Set up a Linux swap area on a device or in a file.
+> Note: `path/to/file` can either point to a regular file or a swap partition.
+> More information: <https://manned.org/mkswap>.
+
+- Set up a given swap area:
+
+`sudo mkswap {{path/to/file}}`
+
+- Check a partition for bad blocks before creating the swap area:
+
+`sudo mkswap -c {{path/to/file}}`
+
+- Specify a label for the partition (to allow `swapon` to use the label):
+
+`sudo mkswap -L {{label}} {{/dev/sda1}}`