move contributing guide to the repo

Fix count when parsing `bottom` command (#1240)

* Fix count when parsing `bottom` command

* Revert "Fix count when parsing `bottom` command"

This reverts commit a0b6bb5.

* Alternate implementation

* Add comment

update doc

cc #1176

revert dim colors for previews

cc #924 #1038

update doc

restart event polling after ui resume on windows

cc #677

update doc

build release only on tags

ignore erase line escape code

cc #440

export OLDPWD variable as the initial directory

cc #601