Improve help

Add usage instructions and short description with the app.

src/index.ts

@@ -9,6 +9,10 @@ import {
 
 void main(
   yargs
+    .scriptName('oblique')
+    .usage(`Oblique Strategies - Be creative, pick constraints, get to work.
+
+Usage: $0 [-c <cards>] [-f] [-p <presentation>]`)
     .option('cards', {
       alias: 'c',
       description: "List of source for generating cards. Can have 'default', a pipe-delimited string starting with 'text:' or a URL starting with file:/// or http[s]://",
@@ -53,5 +57,8 @@ void main(
       default: 'plain',
     })
     .help()
+    .alias('h', 'help')
+    .alias('v', 'version')
+    .wrap(yargs.terminalWidth())
     .parse(hideBin(process.argv)) as MainArgs,
 );