feat(commands): more commands (#30)

- I wrote a scripts to copy and generate all commands missing in iris
from fig repo: https://github.com/withfig/autocomplete
- Add a new script to generate commands docs about which commands
currently are inside commands folder
377d4aac663590e504fe39a92eb4dac4cbd333b2
- Add more icons e64d4e70a1db61e62053460a882e093bd6373ab1

commands/sys/rscript.go

@@ -0,0 +1,27 @@
+package sys
+
+import (
+	"github.com/versenilvis/iris/commands/core"
+)
+
+func init() {
+	core.Register(&core.Spec{
+		Name:        "rscript",
+		Description: "Scripting Front-End for R",
+		Options: []core.Option{
+			{Name: "-e", Description: "R expression to run"},
+			{Name: "--help", Description: "Print usage and exit"},
+			{Name: "--version", Description: "Print version and exit"},
+			{Name: "--verbose", Description: "Print information on progress"},
+			{Name: "--no-echo", Description: "Run as quietly as possible"},
+			{Name: "--no-restore", Description: "Don't restore anything"},
+			{Name: "--save", Description: "Do save workspace at the end of the session"},
+			{Name: "--no-environ", Description: "Don't read the site and user environment files"},
+			{Name: "--no-site-file", Description: "Don't read the site-wide Rprofile"},
+			{Name: "--no-init-file", Description: "Don't read the user R profile"},
+			{Name: "--restore", Description: "Do restore previously saved objects at startup"},
+			{Name: "--vanilla", Description: "Combine --no-save, --no-restore, --no-site-file --no-init-file and --no-environ"},
+			{Name: "--default-packages", Description: "Comma separated list of default packages"},
+		},
+	})
+}