feat: update to lit v2

[LarsDenBakker]

What I did

1. Updated to lit v2
2. Simplified build config
3. Dropped support for IE11
4. Fixed sorting of packages.json
5. Sort dependencies

[Westbrook]

Bunch of tiny nits and a question or two...

[bennypowers]

I tried resolving conflicts on my local copy of the branch by taking both changes (and manually resolving duplicate dependencies as later version).

yarn && yarn test

UNKNOWN_OPTION: Unknown option: --scaffoldFilesFor
Error: Command failed: node -r @babel/register /Users/bennyp/Developer/open-wc/create/src/create.js       --destinationPath /Users/bennyp/Developer/open-wc/create/test/snapshots       --type scaffold       --scaffoldType app       --features linting testing demoing building       --scaffoldFilesFor testing demoing building       --typescript false       --tagName scaffold-app       --writeToDisk true       --installDependencies false

/Users/bennyp/Developer/open-wc/create/node_modules/command-line-args/dist/index.js:1377
        throw err

[bennypowers]

Alright I got the tests to run but that raised some questions. This PR, as it is when master is merged in, seems like it's in an odd state. There are multiple references to scaffoldFilesFor, but the main cli entrypoint removed the option. I'm not sure how to proceed. Do we / did we remove that option entirely?

[bennypowers]

This PR installs some seemingly useless devDependencies:

    "@open-wc/testing": "^2.5.33",
    "@rollup/plugin-babel": "^5.3.0",
    "@web/rollup-plugin-html": "^1.9.1",
    "@web/rollup-plugin-import-meta-assets": "^1.0.7",

and

    "lit": "^2.0.0-rc.2",

These are here because our integration testing writes actual files to the /create package root, therefore eslint import plugin is able to resolve them in /create/node_modules. This is not ideal. Tests which rely on the scaffolded package's node_modules should run e2e in an isolated temp dir that's not affected by create's node_modules, or in a virtual filesystem where deps are stubbed.

[bennypowers]

replaced @open-wc/eslint-config and eslint-config-prettier with @open-wc and prettier, respectively, in eslint-config "extends" blocks