chore: add workflow to format using prettier

[trivikr]

Which problem is this PR solving?

• Fixes Run prettier in the development workflow #2543

Short description of the changes

• In the first commit, I've added format command and run it in the workflow. Once an existing maintainer approves it, the CI will fail.
• Once the CI is run, and fails, I'll update the PR to format the 18 files listed in Run prettier in the development workflow #2543 (comment), and the CI will be successful.

[trivikr]

Converted PR to draft as the formatting changes still need to be added before it can be merged.
A maintainer can approve the workflows though, while the PR is in draft.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.75%. Comparing base (162feb1) to head (7b901a2).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2545   +/-   ##
=======================================
  Coverage   90.75%   90.75%           
=======================================
  Files         169      169           
  Lines        8018     8018           
  Branches     1632     1632           
=======================================
  Hits         7277     7277           
  Misses        741      741           

[trivikr]

The "Format" workflow failed as expected

Run npm run format

> [email protected] format
> prettier --check $(git ls-files '*.ts')

Checking formatting...
[warn] examples/express/src/client.ts
[warn] examples/express/src/server.ts
[warn] examples/express/src/tracer.ts
[warn] examples/koa/src/client.ts
[warn] examples/koa/src/server.ts
[warn] examples/koa/src/tracer.ts
[warn] examples/mongodb/src/client.ts
[warn] examples/mongodb/src/server.ts
[warn] examples/mongodb/src/tracer.ts
[warn] examples/mongodb/src/utils.ts
[warn] examples/mysql/src/client.ts
[warn] examples/mysql/src/server.ts
[warn] examples/mysql/src/tracer.ts
[warn] examples/redis/src/client.ts
[warn] examples/redis/src/express-tracer-handlers.ts
[warn] examples/redis/src/server.ts
[warn] examples/redis/src/setup-redis.ts
[warn] examples/redis/src/tracer.ts
[warn] Code style issues found in 1[8](https://github.com/open-telemetry/opentelemetry-js-contrib/actions/runs/11958404330/job/33337854936?pr=2545#step:5:9) files. Forgot to run Prettier?
Error: Process completed with exit code 1.

https://github.com/open-telemetry/opentelemetry-js-contrib/actions/runs/11958404330/job/33337854936?pr=2545

[trivikr]

Formatting was fixed in 7b901a2 (#2545) by running npm run format:fix

The "Format" CI is now successful.

[trivikr]

The CodeQL error workflow was not there when the last time page was edited in #1938. The error is also in an example code.

It shouldn't be blocking this PR which just formats the code.

[trivikr]

Marking as draft as CodeQL CI failure unrelated to formatting is fixed in #2546

This PR can be made ready once the fix is merged, and rebased.

[trivikr]

This PR was mistakenly closed by GitHub automatically, as the #2546 was going to close the CodeQL CI failure, and not the CI itself.

Since I can't reopen the PR, I've posted a new one at #2552