fix: pretty print PublicKey objects in node and in the browser

[steveluscher]

Problem

console.log(publicKey) is unreadable in Node.

Summary of Changes

Add an object stringifier that includes the base58 string.

Test plan

Node

$ node
Welcome to Node.js v16.18.1.
Type ".help" for more information.
> const {PublicKey} = require('./lib/index.cjs.js')
undefined
> console.log(PublicKey.default.toString())
11111111111111111111111111111111
undefined
> console.log(PublicKey.default)
PublicKey [PublicKey(11111111111111111111111111111111)] {
  _bn: <BN: 0>
}
undefined

Browser

Fixes #20022.

[steveluscher]

I'll have to double check that this doesn't narrow our browser compatibility too much (eg. for browsers that are missing Symbol) and that it still works in React Native. cc/ @jacobcreech

[codecov]

Codecov Report

Merging #29062 (287f838) into master (35f3c18) will decrease coverage by 0.0%.
The diff coverage is 100.0%.

@@            Coverage Diff            @@
##           master   #29062     +/-   ##
=========================================
- Coverage    76.8%    76.7%   -0.1%     
=========================================
  Files          55       55             
  Lines        3127     3141     +14     
  Branches      466      472      +6     
=========================================
+ Hits         2403     2411      +8     
- Misses        559      565      +6     
  Partials      165      165             

[steveluscher]

Tested in React Native 0.70 with Hermes. Works fine.

Symbol is supported all the way back to 2015 in major browsers.

Shipping it.

[mergify]

automerge label removed due to a CI failure