Remove un-necessary word lists from bundle - replace ethers with submodules

[jpuri]

We are including huge list of words of which only english is being used:

https://output.circle-artifacts.com/output/job/0b87725e-d9fa-4b1e-87c8-209ba5bb939a/artifacts/0/build-artifacts/source-map-explorer/common-0.html

https://output.circle-artifacts.com/output/job/0b87725e-d9fa-4b1e-87c8-209ba5bb939a/artifacts/0/build-artifacts/source-map-explorer/common-6.html

We can get rif of other languages to reduce bundle size.

This ticket is now about replacing ethers with submodules throughout our dependency graph.

ongoing related PRs:

• https://github.com/MetaMask/metamask-extension/pull/15461
• https://github.com/MetaMask/metamask-extension/pull/15818
• https://github.com/ethereum-optimism/optimism/pull/3363
• https://github.com/MetaMask/controllers/pull/907

[adonesky1]

The wordlists that are added to the bundle from ethers (via ethersproject/wordlist) should be removed with this work currently in progress:

If they aren't removed in this work we may need to patch or create our own versions of @ethersproject/wallet and @ethersproject/json-wallet that don't depend on these wordlists to remove them from from our bundle.

There are other wordlists from bip39 that this ticket may also refer to.

[adonesky1]

This PR to our fork of BIP39 should remove another ~160-180kb from our common.js files:

After that we will still have the extra word-lists from @scure/bip39 another version of bip39 that we use in @metamask/key-tree (which is in the extension dependency tree). We may want to simply change that package to use our bip39 fork. Will investigate.

[adonesky1]

Actually I vaguely remember @rekmarks expressing that we should switch over to using @scure/bip39 rather than our fork of bitcoinjs/bip39? Maybe I'm imagining or misattributing that but... Erik and @kumavis do you think its worth swapping over to using a fork of @scure/bip39 with our same patches and then removing the unused wordlists as I am suggesting we do in this PR to our fork, and then consolidate around using that in @metamask/key-tree, @metamask/eth-hd-keyring and @metamask/keyringcontroller?

[rekmarks]

I think we should switch over to @scure, fork it, apply our patches, and then consolidate around that. Per its readme, the benefits of @scure/bip39 over bip39 are:

• Is 491KB all-bundled instead of 1.3MB
• Uses 2 dependencies instead of 15
• Wordlists are 157KB instead of 315KB
• Had an external security audit by Cure53 on Jan 5, 2022