[Idea]: Toggle percentage and absolute left amount for storage capacity

[jiwooh]

Overview of the requested feature

In metric bar settings, add a toggle which chooses between showing storage used percentage and the amount of storage left with GB/MB.

Reason for the request

I remember this was on the original RunCat, so I would like for this feature to be not neglected!

Related Issues

No response

Check List

• I have read the CONTRIBUTING.md and agree to follow it.
• The proposed feature is beneficial to a wide range of users and not just a personal preference.
• Checked that no similar requests already exist.

[Kyome22]

@jiwooh As you pointed out, I understand there is a strong demand for displaying storage capacity in TB, GB, MB, etc. Although I scaled back some features in the first release to clean up the overall structure, I plan to address this in the future.

[surendra10125]

#51

I have fixed this and pushed kindly check and accept the PR