feat: aztec-up can be used to manage multiple aztec versions

[charlielye]

aztec-up can be used to manage multiple versions.

$ aztec-up
aztec-up - Aztec version manager

Usage: aztec-up [command] [options]

Commands:
  install <version>         Install a version (does not switch to it)
  use [<version>]           Switch to an installed version (or read from .aztecrc)
  list                      List installed versions
  uninstall <version>       Remove an installed version
  self-update               Update aztec-up itself to the latest version

Options:
  -h, --help                Show this help message

Examples:
  aztec-up install          Install the latest version
  aztec-up install nightly  Install the latest nightly version
  aztec-up install 0.85.0   Install a specific version
  aztec-up use 0.85.0       Switch to version 0.85.0
  aztec-up use              Read version from .aztecrc and switch to it
  aztec-up list             Show all installed versions
  aztec-up self-update      Update aztec-up to latest

[charlielye]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
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• feat: aztec-up can be used to manage multiple aztec versions #19261 👈 (View in Graphite)
• feat: aztec-up installs without docker #18665
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[olehmisar]

a suggestion:

does this make aztec command read from .aztecrc as well?

E.g., the ideal workflow (similar to gaztec):

bash -i <(curl -s https://install.aztec.network)
aztec --version
#> 2.1.9 # the latest version by default

echo 3.0.0 > .aztecrc
aztec --version
#> 3.0.0

# in another project
echo 3.0.0-devnet.5 > .aztecrc
aztec --version
#> 3.0.0-devnet.5

Note that aztec-up was never used. Calling aztec should automatically install the version from .aztecrc or fallback to the global installed version (when aztec-up was last called).

This mimics how rust-toolchain.toml works. Maybe worth using aztec-toolchain.toml instead of .aztecrc to make it extendable in the future?