Fix couple stat issues

[nguyentvan7]

Describe your changes

• Remove -1 from things that have no levels
• Adjust char dm util to reduce nesting needed to access values
• Adjust heal util for future heals that don't have a flat value
• Rename brEff_ -> brEffect_ to avoid collision with brEfficiency_ later

Issue or discord link

Testing/validation

Checklist before requesting a review (leave this PR as draft if any part of this list is not done.)

• I have commented my code in hard-to understand areas.
• I have made corresponding changes to README or wiki.
• For front-end changes, I have updated the corresponding English translations.
• I have run yarn run mini-ci locally to validate format and lint.
• If I have added a new library or app, I have updated the deployment scripts to ignore changes as needed

[github-actions]

[sr-frontend] [Sun Sep 15 03:53:58 UTC 2024] - Deployed 88698cf to https://genshin-optimizer-prs.github.io/pr/2442/sr-frontend (Takes 3-5 minutes after this completes to be available)

[Mon Sep 16 00:14:12 UTC 2024] - Deleted deployment

[frzyc]

I am okay with the stat renaming, just need to make sure scanners continue to work. (do we need to raise an issue with scanner devs?)

[nguyentvan7]

Scanners been broke plus we don't even have support from reliquary scanner which is the primo scanner imo. Might be better for us to support their format instead of other way around maybe?

[frzyc]

Scanners been broke plus we don't even have support from reliquary scanner which is the primo scanner imo. Might be better for us to support their format instead of other way around maybe?

sure, we'd just add a conversion layer between.