docs: add descriptions for terminal and fs libs

docs/api/fs.md

@@ -1,11 +1,13 @@
 ---
 name: Module fs
-description: 
+description: filesystem interaction and functionality library
 layout: apidoc
 ---
 
 ## Introduction
-
+The fs module provides easy and simple access to filesystem functions
+and other things, and acts an addition to the Lua standard library's
+I/O and filesystem functions.
 
 ## Functions
 ### abs(path)

docs/api/terminal.md

@@ -1,11 +1,11 @@
 ---
 name: Module terminal
-description: 
+description: low level terminal library
 layout: apidoc
 ---
 
 ## Introduction
-
+The terminal library is a simple and lower level library for certain terminal interactions.
 
 ## Functions
 ### restoreState()

golibs/fs/fs.go

@@ -1,3 +1,7 @@
+// filesystem interaction and functionality library
+// The fs module provides easy and simple access to filesystem functions
+// and other things, and acts an addition to the Lua standard library's
+// I/O and filesystem functions.
 package fs
 
 import (

golibs/terminal/terminal.go

@@ -1,3 +1,5 @@
+// low level terminal library
+// The terminal library is a simple and lower level library for certain terminal interactions.
 package terminal
 
 import (