fix: Forward input refs, add missing form export, remove autogrow shadow element from tab order

[choochootrain]

No description provided.

[erikshestopal]

Would it be too much to ask for you to add a tabIndex={-1} to the shadow input here?
This shadow input messes up tabbing to the next input if the first Input component has autogrow as a prop.

If you plop this code into the molekule docs playground, you'll see that it takes two tab presses to get to the next input element.

<Input
  multiline
  autogrow
  placeholder="Example"
  label="Example"
  value="I already have a value! If provided a value, I become controlled, so I won't update when you type here..."
/>

<Input placeholder="Example" label="Example"  />

[codecov-io]

Codecov Report

Merging #22 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #22   +/-   ##
=======================================
  Coverage   71.91%   71.91%           
=======================================
  Files          12       12           
  Lines         146      146           
  Branches       19       19           
=======================================
  Hits          105      105           
  Misses         31       31           
  Partials       10       10

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