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/project.json

@@ -0,0 +1,51 @@
+{
+  "name": "nx-plugin",
+  "$schema": "../../node_modules/nx/schemas/project-schema.json",
+  "sourceRoot": "libs/nx-plugin/src",
+  "projectType": "library",
+  "tags": [],
+  "targets": {
+    "build": {
+      "executor": "@nx/js:tsc",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/libs/nx-plugin",
+        "main": "libs/nx-plugin/src/index.ts",
+        "tsConfig": "libs/nx-plugin/tsconfig.lib.json",
+        "assets": [
+          "libs/nx-plugin/*.md",
+          {
+            "input": "./libs/nx-plugin/src",
+            "glob": "**/!(*.ts)",
+            "output": "./src"
+          },
+          {
+            "input": "./libs/nx-plugin/src",
+            "glob": "**/*.d.ts",
+            "output": "./src"
+          },
+          {
+            "input": "./libs/nx-plugin",
+            "glob": "generators.json",
+            "output": "."
+          },
+          {
+            "input": "./libs/nx-plugin",
+            "glob": "executors.json",
+            "output": "."
+          }
+        ]
+      }
+    },
+    "lint": {
+      "executor": "@nx/eslint:lint"
+    },
+    "test": {
+      "executor": "@nx/jest:jest",
+      "outputs": ["{workspaceRoot}/coverage/{projectRoot}"],
+      "options": {
+        "jestConfig": "libs/nx-plugin/jest.config.ts"
+      }
+    }
+  }
+}