Add prettier to the devcontainer (GitHub codespaces)

[alamb]

Which issue does this PR close?

• Related to docs: Fix random extra bullet for 'Analytical Functions' #17014
• Related to Update Scalar_functions.md #17018

Rationale for this change

I suggested using dev containers on this PR
#17018 (comment)

However, when I actually tried to use it, I got an error about npm not being installed (see screenshot):

root@codespaces-09a5ab:/workspaces/datafusion# ./dev/update_function_docs.sh
/workspaces/datafusion
Inserting header
Running CLI and inserting aggregate function docs table
    Updating crates.io index
    Blocking waiting for file lock on package cache
    Blocking waiting for file lock on package cache
    ...

   Compiling datafusion v49.0.0 (/workspaces/datafusion/datafusion/core)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 9m 59s
     Running `target/debug/print_functions_docs aggregate`
Running prettier
./dev/update_function_docs.sh: line 68: npx: command not found
root@codespaces-09a5ab:/workspaces/datafusion# apt-get install npm
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package npm

What changes are included in this PR?

1. Add nodejs, npm to the dev container
2. Pre-install prettier

Are these changes tested?

I am testing them manually

Are there any user-facing changes?

[Jefffrey]

Makes sense 👍

[alamb]

Thank you for the review @Jefffrey