OctOS: Add ls and cat commands

Allow listing the contents of a directory
and printing the contents of a file.

octos/bin/cat

@@ -0,0 +1,4 @@
+name = cat
+description = Print the contents of a file
+params = [path]
+exec = os/exec/cat.lua

octos/bin/ls

@@ -0,0 +1,4 @@
+name = ls
+description = List the contents of a directory
+params = [path]
+exec = os/exec/ls.lua

octos/exec/cat.lua

@@ -0,0 +1,10 @@
+local path = ...
+path = path[1]
+
+if path then
+	if fs.exists(path) then
+		print(fs.read(path))
+	end
+else
+	print("Must specify path (see help cat)")
+end

octos/exec/ls.lua

@@ -0,0 +1,10 @@
+local path = ...
+path = path[1]
+
+if path then
+	local contents = fs.list(path)
+	local result = table.concat(contents.files, " ") .. " " .. table.concat(contents.subdirs, " ")
+	print(result)
+else
+	print("Must specify path (see help ls)")
+end