0.2.0: mafs/clerk template, sci, mafs => mafs.core

From the CHANGELOG:

• #12 adds a deps-new template that sets up a basic Clerk project with
  Mafs.cljs installed as a dependency. The template lives
  here.

• #7:

  • Renames the mafs namespace to mafs.core to prevent collisions with the
    "mafs" package import. I was hesitant to do this, but of course you can
    always alias mafs.core to mafs when you require it.

  • Upgrades mafs to 0.15.2, adding support for :on-click to the
    mafs.core/Mafs component.

  • Adds mafs.sci with SCI namespace objects for all namespaces, plus a
    namespaces map and a config for easy installation into SCI. The
    namespaces follows the patterns set by the
    https://github.com/babashka/sci.configs repo.

    • mafs.sci/install! allows the user to install Mafs.cljs into SCI's
      shared context with one mutating call.

  • Migrates the project over to clerk-utils and all of its new custom build
    stuff. This let me simplify development, update the README and DEVELOPING
    pages and kill my shadow-cljs.edn file. user.clj gets quite a bit simpler
    too.

  • Adds notes to the interactive docs guide about:

    • using the library with SCI and with Clerk

    • the required stylesheets, since basically nothing works without these!

  • Upgrades the docs notebook to the latest Clerk version.