tailwind css should not be downloaded on build

[ashleygwilliams]

we recently added a build.rs file that downloads the tailwind cli on cargo build invocations. it has these benefits:

• local development will build the css that is on main, and not use a potentially stale css from the last release
• does not require a node env for local development
• makes it easier to bundle css into the cli so we do not need to fetch css from the network at runtime

it has these downsides:

• any installation method that builds from source fetches the tailwind cli and builds the css from source

  • no user consent
  • no way to turn off
  • useless because it is just immediately inlined and is generally never touched

  related: build.rs having the side effect of downloading tailwind CSS binary without user consent #603, Fix the tailwind dependency breaking the Nix flake #609