Add browser exports

[dayhaysoos]

Adding browser exports back to the package.json. This seems to be the only way to get it to work seamlessly with Docusaurus.

[codecov]

Codecov Report

Merging #192 (c2ca116) into main (09bb89d) will not change coverage.
The diff coverage is n/a.

❗ Current head c2ca116 differs from pull request most recent head 08d729d. Consider uploading reports for the commit 08d729d to get more accurate results

@@           Coverage Diff           @@
##             main     #192   +/-   ##
=======================================
  Coverage   90.28%   90.28%           
=======================================
  Files          63       63           
  Lines       11592    11592           
  Branches     1132     1132           
=======================================
  Hits        10466    10466           
  Misses       1106     1106           
  Partials       20       20           

Components	Coverage Δ
api	95.05% <ø> (ø)
common	95.00% <ø> (ø)
credentials	∅ <ø> (∅)
crypto	94.87% <ø> (ø)
dids	92.16% <ø> (ø)
agent	89.18% <ø> (ø)
identity-agent	60.50% <ø> (ø)
proxy-agent	60.00% <ø> (ø)
user-agent	58.67% <ø> (ø)

[frankhinek]

A few extra steps were required to get alpha publishing working as needed for @dayhaysoos to complete tests. Since I couldn't push to Nick's fork, a new PR was created to replace this one:
https://github.com/TBD54566975/web5-js/pull/198/files