Update Codecov Configuration to Enable Annotations and Improve Stability

[mohitdev06]

Update Codecov Configuration

This pull request updates the .codecov.yml file to enhance code coverage reporting.

Key Changes:

Enabled Annotations: Provides detailed feedback on coverage changes within pull requests.
Set Coverage Status to Informational: Avoids build failures due to minor coverage fluctuations.

These updates aim to improve code quality and stability by making coverage issues more visible and preventing unnecessary build failures.

Fixes issue #12227 related to coverage fluctuations.

[welcome]

First PR! 🚀 We sincerely appreciate that you have taken the time to propose a change to AnkiDroid! Please have patience with us as we are all volunteers - we will get to this as soon as possible.

[mikehardy]

Hey there 👋 - thanks for this

I don't like the change to turning annotations on as we disabled those on purpose, they were very noisy and did not add value

If the goal here is to prevent fluctuations what I would prefer to see is for you to work on your fork of Anki-Android, with codecov enabled there, and actually determine why there are fluctuations then propose a PR to fix the fluctuations

Simply turning on annotations here adds a lot of noise to all PRs and does not solve the issue

(note: you will most likely need to go to codecov with your github login and enable coverage uploading without a token... as was shown in comments for #17443 / #17443 (comment) )