Macos pkg default installation location should be `~/Applications/quarto` instead of `/Applications/quarto`

Bug description

When installing the quarto pkg file for MacOS, the current default installation requires root. Is there a reason this was chosen as the default?

I'd like to propose changing it such that it installs just for one user by default. Users can opt-in to choosing to install it for all users (i.e. with root) if they'd like.

Checklist

• Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
• Please format your issue so it is easier for us to read the bug report.
• Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
• Please document the operating system you're running. If on Linux, please provide the specific distribution.
• Please provide the output of quarto check so we know which version of quarto and its dependencies you're running.

Inspect the macOS .pkg packaging configuration that sets the default installation path. Compare user-scoped installation under ~/Applications/quarto with the existing /Applications/quarto behavior, then verify that the default no longer requires root while an all-users option remains available.