feat(docs-infra): generate Angular CLI command reference (#25363)

PR Close #25363

aio/tools/transforms/cli-docs-package/rendering/cliNegate.js

@@ -0,0 +1,6 @@
+module.exports = function cliNegate() {
+  return {
+    name: 'cliNegate',
+    process: function(str) { return 'no' + str.charAt(0).toUpperCase() + str.slice(1); }
+  };
+};

aio/tools/transforms/cli-docs-package/rendering/cliNegate.spec.js

@@ -0,0 +1,17 @@
+var factory = require('./cliNegate');
+
+describe('cliNegate filter', function() {
+  var filter;
+
+  beforeEach(function() { filter = factory(); });
+
+  it('should be called "cliNegate"', function() { expect(filter.name).toEqual('cliNegate'); });
+
+  it('should make the first char uppercase and add `no` to the front', function() {
+    expect(filter.process('abc')).toEqual('noAbc');
+  });
+
+  it('should make leave the rest of the chars alone', function() {
+    expect(filter.process('abCdE')).toEqual('noAbCdE');
+  });
+});