Added a number of message commands

NOTES.md

dclish/dclish.go

editor/tview.go

folders/folders.go

folders/messages.go

folders/sql/1_create_table.down.sql

folders/sql/1_create_table.up.sql

folders/verify.go

repl/command.go

repl/folders.go

repl/messages.go

repl/repl.go