cmd/update_report: format new formulae/casks as table

[branchv]

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Very minor style tweak to print new formulae/casks as a table with evenly spaced columns. Generally, I am mainly glancing at the package names and then read the description for anything that catches my eye. Currently, the names/descriptions blend in and can be noisy to me, especially with a lots of new packages.

This PR tries to help readers quickly distinguish the name from the description, which I find more readable

Example:

$ git -C $(brew --repo homebrew/core) checkout @{3.days.ago}
$ brew update

Before:

==> New Formulae
filtlong: Quality filtering of long noisy DNA sequencing reads
librefang: Self-hostable operating system for autonomous AI agents
netcode: Secure client/server protocol for multiplayer games built on top of UDP
opencv@4: Open source computer vision library
rawtoaces: Utility for converting camera RAW image files to ACES
reliable: Simple packet acknowledgement system for UDP-based protocols
salmon: Transcript-level quantification from RNA-seq reads
smithery-cli: Install and list Model Context Protocol servers from Smithery
soar: Fast, modern package manager for Static Binaries, Portable Formats and more
trim-galore: Quality and adapter trimming for FastQ sequencing reads

After:

==> New Formulae
filtlong       Quality filtering of long noisy DNA sequencing reads
librefang      Self-hostable operating system for autonomous AI agents
netcode        Secure client/server protocol for multiplayer games built on top of UDP
opencv@4       Open source computer vision library
rawtoaces      Utility for converting camera RAW image files to ACES
reliable       Simple packet acknowledgement system for UDP-based protocols
salmon         Transcript-level quantification from RNA-seq reads
smithery-cli   Install and list Model Context Protocol servers from Smithery
soar           Fast, modern package manager for Static Binaries, Portable Formats and more
trim-galore    Quality and adapter trimming for FastQ sequencing reads

[Copilot]

Pull request overview

This PR adjusts brew update’s update report output to display “New Formulae” and “New Casks” in a two-column, table-like format to better visually separate names from descriptions.

Changes:

• Collect new formulae and casks into [name, description] rows instead of printing each line directly.
• Add a print_table helper to compute column width and render aligned output.

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[MikeMcQuaid]

Thanks! Code looks good but want to have some shared "print table" implementation.

[MikeMcQuaid]

Look at services/subcommand/list.rb, Library/Homebrew/cmd/info.rb: this would be at least the third "print a table" implementation we have. Would be good to extract all these to utils so they can be shared