fix(suite-desktop-core): proper name & place for electron-builder hooks

[Lemonexe]

Description

Fix suite-desktop-core/tsconfig.lib.json, because yarn update-project-references is unstable; produces diff that is not detected by yarn verify-project-references, so it passed CI when I merged it in #17056 😮

• The diff is in #17231, but on second thoughts, commiting the diff is not right.
• In our repo, yarn build:lib is always used for building "the main source code" of the given package.
• But in this case, I want to build just the suite-desktop-core/scripts/ dir
  • electron-builder scripts are totally separate from src/, they don't use any of the workspace imports
• so it doesn't make sense call it build:lib → rename to build:scripts
  • → does not get picked up by yarn update-project-references, which is correct, because it's a custom task
• also, if I add all the workspace references, it slows down yarn build:scripts from 5s to 15s on my PC 🐌 🐢 😴

QA

Tested that desktop build works from scratch (all gitignored dirs deleted in suite-desktop) ✔️

Notes

The tsconfig.lib.json passed CI, because yarn verify-project-references throws only on tsconfig.json,
but yarn update-project-references modifies also tsconfig.lib.json.

The script is inconsistent, yarn verify-project-references should throw if there are any changes that would be modified by yarn update-project-references.
That should be fixed, but outside of scope of this PR.

@coderabbitai ignore

[Lemonexe]

❗ It was a mistake to include building electron-builder hooks in the build:core, because that's not related to electron-builder at all, it builds JS bundle for electron-main process 🤦
Instead, I moved build:scripts where it logically belongs - as first step of build:app:electron

Ofc it worked incidentally, because build:core gets called before build:app:electron