test: compressed bundle size is less than 1MB

[0xpatrickdev]

closes #36

✔ build-proposal › proposal builder generates compressed bundles less than 1MB (1.9s)
  ℹ agoric run stdout: agoric: run: Deploy script will run with Node.js ESM
    bundle-source --to /Users/0xpatrick/repos/dapp-offer-up/contract/bundles /Users/0xpatrick/repos/dapp-offer-up/contract/src/offer-up.contract.js offer-up
    creating start-offer-up-permit.json
    creating start-offer-up.js
    You can now run a governance submission command like:
      agd tx gov submit-proposal swingset-core-eval start-offer-up-permit.json start-offer-up.js \
        --title="Enable <something>" --description="Evaluate start-offer-up.js" --deposit=1000000ubld \
        --gas=auto --gas-adjustment=1.2
    Remember to install bundles before submitting the proposal:
      agd tx swingset install-bundle @/Users/0xpatrick/.agoric/cache/b1-88b354fd27623534134d369f89d20bbb7ed82420bba99669eba34a8b1847345ff43418e0c8cf4dac1ed4e8102eca534f5ba7c4e695239f01f074ad84f62cfa74.json
      agd tx swingset install-bundle @/Users/0xpatrick/.agoric/cache/b1-5a4ee4b4f5106eca1ba71fd7f8cf97875f162c2439ca1077375e2adf4a5fe29c4f5b811b1bbc4040e5f45ca617e141f7dc64374660d8945eb8783c7bb8edc22f.json

  ℹ {
      bundleId: 'b1-88b354fd27623534134d369f89d20bbb7ed82420bba99669eba34a8b1847345ff43418e0c8cf4dac1ed4e8102eca534f5ba7c4e695239f01f074ad84f62cfa74',
      compressedSize: '0.3141002655029297 MB',
    }
  ℹ {
      bundleId: 'b1-5a4ee4b4f5106eca1ba71fd7f8cf97875f162c2439ca1077375e2adf4a5fe29c4f5b811b1bbc4040e5f45ca617e141f7dc64374660d8945eb8783c7bb8edc22f',
      compressedSize: '0.1577749252319336 MB',
    }

Questions

1. I was going to put this in contract/test/test-bundle-source.js, but got confused as that seems to only produces one bundle. Should this test be added there or is this separate file fine?

2. I'm not sure this will work in CI - ../bundles/bundle-offer-up.js is present in my local but not sure it will be at this point in CI. seems to be fine: https://github.com/Agoric/dapp-offer-up/actions/runs/7647247910/job/20837765045?pr=56#step:7:26

[dckc]

good to have this

I don't understand the motivation to add a dependency on execa, though