Add a bunch of apps (#352)

* add tuist (#272)

* add cocoapods (#270)

* add swiftpm (#269)

* add missing newline to tuist.json

* add ash (#283)

* add help for expo

* set correct android env vars (#32, #342)

* add scriptkit (#297)

* update xdg-utils message (#300)

* fix ipython error in pythonrc (#289)

* zsh directories need to be created manually (#341)

* add instructions for dotnet (#349)

* simplify emacs instructions (#315)

* ash: directory must be created manually

* add instructions for tldrc (#295)

* add a warning for xinitrc and Xauthority (#274)