Show real bandwidth amount needed to fully download a package

[babakfp]

Describe the feature

What the website currently shows:

3.9 MB unpacked size (this package)
52.7 MB total unpacked size (including 1 dependency for linux-x64)

What also to show (that 19.96 MB amount):

|> pnpm self-update
Checking for updates...
Switching pnpm from v11.21.0 to v12.4.2...
.../5dec-1a0ae586988-149af28310250f2c    |   +2 +
Downloading @pnpm/exe.win32-x64@12.4.2: 19.96 MB/19.96 MB, done
.../5dec-1a0ae586988-149af28310250f2c    | Progress: resolved 2, reused 0, downloaded 2, added 2, done
Successfully updated pnpm to v12.4.2

Additional information

• Would you be willing to help implement this feature?

Final checks

• Read the contribution guide.
• Check existing issues.