feat(schematics): Add ng2-charts-schematics npm package

Add schematics for generating components with charts.
Fore example `ng generate ng2-charts-schematics:line my-line` will
create a component called `my-line` which contains a line
chart.

.vscode/launch.json

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+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "chrome",
+      "request": "launch",
+      "name": "Launch Chrome against localhost",
+      "url": "http://localhost:4200",
+      "webRoot": "${workspaceFolder}",
+      "runtimeArgs": [
+        "--preserve-symlinks"
+      ]
+    }
+  ]
+}

ng2-charts-schematics/.gitignore

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+# Outputs
+src/**/*.js
+src/**/*.js.map
+src/**/*.d.ts
+
+# IDEs
+.idea/
+jsconfig.json
+.vscode/
+
+# Misc
+node_modules/
+npm-debug.log*
+yarn-error.log*
+
+# Mac OSX Finder files.
+**/.DS_Store
+.DS_Store

ng2-charts-schematics/.npmignore

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+# Ignores TypeScript files, but keeps definitions.
+*.ts
+!*.d.ts

ng2-charts-schematics/README.md

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+# Schematics for `ng2-charts`
+
+## Installation
+
+```bash
+npm install --save-dev ng2-charts-schematics
+```
+
+## Usage
+
+Generate a component with a line chart:
+
+```bash
+ng generate ng2-charts-schematics:line my-line-chart
+```
+
+Supported chart types are `line`, `bar`, `radar`, `pie`, `polar-area`, `doughnut`, `bubble` and `scatter`.