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

tldr/sort

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sort
+
+> Sort lines of text files.
+> More information: <https://www.gnu.org/software/coreutils/sort>.
+
+- Sort a file in ascending order:
+
+`sort {{path/to/file}}`
+
+- Sort a file in descending order:
+
+`sort --reverse {{path/to/file}}`
+
+- Sort a file in case-insensitive way:
+
+`sort --ignore-case {{path/to/file}}`
+
+- Sort a file using numeric rather than alphabetic order:
+
+`sort --numeric-sort {{path/to/file}}`
+
+- Sort `/etc/passwd` by the 3rd field of each line numerically, using ":" as a field separator:
+
+`sort --field-separator={{:}} --key={{3n}} {{/etc/passwd}}`
+
+- Sort a file preserving only unique lines:
+
+`sort --unique {{path/to/file}}`
+
+- Sort a file, printing the output to the specified output file (can be used to sort a file in-place):
+
+`sort --output={{path/to/file}} {{path/to/file}}`
+
+- Sort numbers with exponents:
+
+`sort --general-numeric-sort {{path/to/file}}`