Wasm example improvements

[vuldin]

This PR contains a few updates:

• dependencies are updated for the wasm project
• Multiple updates to three READMEs: 1) main, 2) the JS client, and 3) wasm app
• switch to avsc mainly due to details found here

The updated README contains steps for running the app: https://github.com/vuldin/redpanda-examples/blob/wasm-example-improvements/wasm/js/transform_avro/README.md

[CLAassistant]

All committers have signed the CLA.

[vuldin]

This PR resolves an error when attempting to run npm run build with node@17:

  this[kHandle] = new _Hash(algorithm, xofLen);
                  ^

Error: error:0308010C:digital envelope routines::unsupported
    at new Hash (node:internal/crypto/hash:67:19)
    at Object.createHash (node:crypto:135:10)
    at module.exports (/Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/webpack/lib/util/createHash.js:135:53)
    at NormalModule._initBuildHash (/Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/webpack/lib/NormalModule.js:417:16)
    at handleParseError (/Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/webpack/lib/NormalModule.js:471:10)
    at /Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/webpack/lib/NormalModule.js:503:5
    at /Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/webpack/lib/NormalModule.js:358:12
    at /Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/loader-runner/lib/LoaderRunner.js:373:3
    at iterateNormalLoaders (/Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/loader-runner/lib/LoaderRunner.js:214:10)
    at Array.<anonymous> (/Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/loader-runner/lib/LoaderRunner.js:205:4)
    at Storage.finished (/Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:55:16)
    at /Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:91:9
    at /Users/josh/projects/redpanda/redpanda-examples/wasm/js/transform_avro/node_modules/graceful-fs/graceful-fs.js:123:16
    at FSReqCallback.readFileAfterClose [as oncomplete] (node:internal/fs/read_file_context:68:3) {
  opensslErrorStack: [ 'error:03000086:digital envelope routines::initialization error' ],
  library: 'digital envelope routines',
  reason: 'unsupported',
  code: 'ERR_OSSL_EVP_UNSUPPORTED'
}

[vuldin]

I pushed an update to the switch avro-js for avsc commit, which changed the output topic name to match what was referenced in the README (avro).

[vuldin]

Pushed an update that makes this PR compatible with another PR in review #18. Once reviewed/approved, either PR can now be merged first.

[graphcareful]

Really nice work, thanks for the contribution! Only non nit comment from me was to keep the version consistent with the technical preview release.

[vuldin]

Added a new commit that addressed feedback (thanks @graphcareful !). I also realized that upload-schema.js was included in ESM module format. This was done because another PR adds a dependency that only supports ESM modules and producer.js is refactored there. But since that PR isn't merged I'll wait to add upload-schemas.js until then.

[vuldin]

Let me know if anyone thinks I should squash the commits and modify them so they make more sense based on what is changing in this PR.

[jrkinley]

Thanks for this @vuldin. My only comment is I think we should consolidate all Docker Compose examples in the same top-level directory. Happy to do it in this PR or a follow up PR.

[vuldin]

I've updated the branch with the following changes:

• move compose.yaml and redpanda.yaml into docker-compose directory (and rename files)
• rebase from main branch (handle merge conflicts)
• update docs to reflect updates from previous commits to main
• add cleanup section to wasm README
• update js client README to reflect docker compose file changes

[vuldin]

I don't like the commit history... I would like to have fixed that prior to a PR. But this PR has been around a while and review has already started, so I'm ok with keeping it as-is if everyone else is.