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

tldr/redshift

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# redshift
+
+> Adjust the color temperature of your screen according to your surroundings.
+> More information: <http://jonls.dk/redshift>.
+
+- Turn on Redshift with a specific [t]emperature during day (e.g., 5700K) and at night (e.g., 3600K):
+
+`redshift -t {{5700}}:{{3600}}`
+
+- Turn on Redshift with a manually specified custom [l]ocation:
+
+`redshift -l {{latitude}}:{{longitude}}`
+
+- Turn on Redshift with a specific screen [b]rightness during the day (e.g, 70%) and at night (e.g., 40%):
+
+`redshift -b {{0.7}}:{{0.4}}`
+
+- Turn on Redshift with custom [g]amma levels (between 0 and 1):
+
+`redshift -g {{red}}:{{green}}:{{blue}}`
+
+- Turn on Redshift with a constant unchanging color temperature:
+
+`redshift -O {{temperature}}`