New setup docs

[rahul-kothari]

After #3090 and #3128, the setup + installation is completely changed

• no nargo needed (we use noir-wasm) - so no need to update or download nargo anymore
  edit: need it for LSP and nargo --new contract
• no need to individually update yarn packages or nargo.toml
• if installed sandbox using docker -> running the curl command, now updates sandbox and also installs aztec-CLI as a docker image
  • if you had cli previously installed as an npm/yarn package, then it doesn't update the cli.

Running aztec-cli update in your project directory does the following:

• if you installed sandbox using docker -> it aborts. Tells you to run curl command, and then rerun the aztec-cli update command
• If you installed sandbox using npm/yarn/pnpm -> it updates the package to your specified version (by default: latest)
• It then finds package.json (if it can't find it, it aborts) and updates all aztec npm dependencies to the version of your sandbox
• You also provide all your contract paths like so --contract src/contracts/Token --contract src/contracts/TokenBridge - it finds nargo.toml there and updates aztec-nr version to the version of your sandbox!
• It also outputs the diffs!

Other doc updates:

• We always tell users to install aztec-cli globally. Maybe tell them to do so locally? Given current command doesn't update global aztec-cli? Alternatively, current command can update global aztec-cli.
• In places other than tutorials, (eg getting started) we only mention the docker flow and not the npm flow. Mention that
• Updating page -> also explain what the current command does
• Updating page uses "cli/uipdating" as a URL - https://docs.aztec.network/dev_docs/cli/updating. It should just be "updating"
• Change "nargo project" references to "noir project"