Add docs for Bait

Bait.md

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+Bait is the event emitter for Hilbish. Why name it bait? Because it throws hooks that you can catch.
+(emits events that you can listen to) and because why not, fun naming is fun.  
+This is what you will use if you want to listen in on hooks to know when certain things have happened, like when you've changed directory, a command has failed, etc.  
+To require:
+```lua
+local bait = require 'bait'
+```
+
+# Functions
+### Bait.throw(hookname, args)
+
+Throws (emits) a new hook to catch.
+`args` is the arguments that will be provided to the `hookfunc` in `Bait.catch`
+
+#### Example
+```lua
+bait.throw('hello', 'world!')
+```
+
+### Bait.catch(hookname, hookfunc)
+
+Binds a new hook named `hookname` to `hookfunc`.
+
+#### Example
+```lua
+bait.catch('hello', function(name)
+    print('Hello ' .. name .. '!')
+end)
+```