Fixed bug 'AuthHeaders ignored for sendOnClose'

[rc10house]

Function sendOnClose() no longer uses global.navigator.sendBeacon() to send its logs, now uses global.fetch() which supports authentication headers.

[rc10house]

Added pre-commit hooks for linting, formatting, building, and testing. Note: this commit ran the formatter resulting in a large number of source files being modified (formatted). The important changed files in commit 1512c48 are .husky/pre-commit, package.json, eslint.config.mjs, .eslintrc.json

[EandrewJones]

@rc10house I just noticed a few things.

1. You're doing this work directly on your master and merging to master.
2. You've combined multiple tickets into a single PR.

Please do the following:

1. Revoke this PR.
2. Create a new branch for each issue you are working on and include the issue number in the branch title, e.g. 399-auth-headers-ignored-send-on-close
3. Cherry pick the correct commits from your master into each branch, respectively.
4. Roll back your master to match the REMOTE master
5. Squash the commits for each issue-branch into a single commit.
6. Create separate PRs for each of the issue-branches, and reference the issues in the PR text via #<issue-number-here>.

This will keep the history clean and maintain a one-one mapping between commits and issues. Very important.

[rc10house]

Will do. Sorry, I had issue/feature branches locally but merged them into master before opening the PR.