feat(nx): add basic-lib generator for streamlined library creation (#14992)

* feat(nx): add basic-lib generator for streamlined library creation

This adds a new nx-plugin library with a generator for creating "common" type
Bitwarden libs. It is set up to accept a lib name, description, team, and
directory. It then
- Creates a folder in the directory (default to libs)
- Sets up complete library scaffolding:
  - README with team ownership
  - Build, lint and test task configuration
  - Test infrastructure
- Configures TypeScript path mapping
- Updates CODEOWNERS with team ownership
- Runs npm i

This will make library creation more consistent and reduce manual boilerplate setup.

The plugin design itself was generated by `npx nx g plugin`. This means we
used a plugin to generate a plugin that exports generators. To create our
generator generator, we first needed a generator.

* fix(dirt/card): correct tsconfig path in jest configuration

Fix the relative path to tsconfig.base in the dirt/card library's Jest config.
The path was incorrectly using four parent directory traversals (../../../../)
when only three (../../../) were needed to reach the project root.

* chore(codeowners): clarify some nx ownership stuff

libs/nx-plugin/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "@bitwarden/nx-plugin",
+  "version": "0.0.1",
+  "description": "Custom Nx tools like generators and executors for Bitwarden projects",
+  "private": true,
+  "type": "commonjs",
+  "main": "./src/index.js",
+  "types": "./src/index.d.ts",
+  "license": "GPL-3.0",
+  "author": "Platform",
+  "generators": "./generators.json"
+}