docs(core): add search keywords (#30636)

Adds keywords to improve search indexing

Author: isaacplmann

docs/generated/packages/angular/documents/overview.md

@@ -1,6 +1,7 @@
 ---
 title: Overview of the Nx Angular Plugin
 description: The Nx Plugin for Angular contains executors, generators, and utilities for managing Angular applications and libraries within an Nx workspace.
+keywords: [angular]
 ---
 
 The Nx Plugin for Angular contains executors, generators, and utilities for managing Angular applications and libraries

docs/generated/packages/nest/documents/overview.md

@@ -1,6 +1,7 @@
 ---
 title: Nest.js Plugin for Nx
 description: Learn how to use the @nx/nest plugin to create and manage Nest.js applications and libraries in your Nx workspace, including setup and generators.
+keywords: [nest, nestjs]
 ---
 
 Nest.js is a framework designed for building scalable server-side applications. In many ways, Nest is familiar to Angular developers:

docs/generated/packages/react/documents/overview.md

@@ -1,6 +1,7 @@
 ---
 title: React Plugin for Nx
 description: Learn how to use the @nx/react plugin to create and manage React applications and libraries in your Nx workspace, including components, hooks, and more.
+keywords: [react]
 ---
 
 The React plugin contains executors and generators for managing React applications and libraries within an Nx workspace.

docs/shared/concepts/decisions/project-size.md

@@ -1,6 +1,7 @@
 ---
 title: Project Size
 description: Understand the trade-offs of project granularity in Nx, including benefits like faster commands, clearer boundaries, and improved developer experience.
+keywords: [library]
 ---
 
 # Project Size

docs/shared/packages/angular/angular-plugin.md

@@ -1,6 +1,7 @@
 ---
 title: Overview of the Nx Angular Plugin
 description: The Nx Plugin for Angular contains executors, generators, and utilities for managing Angular applications and libraries within an Nx workspace.
+keywords: [angular]
 ---
 
 The Nx Plugin for Angular contains executors, generators, and utilities for managing Angular applications and libraries

docs/shared/packages/nest/nest-plugin.md

@@ -1,6 +1,7 @@
 ---
 title: Nest.js Plugin for Nx
 description: Learn how to use the @nx/nest plugin to create and manage Nest.js applications and libraries in your Nx workspace, including setup and generators.
+keywords: [nest, nestjs]
 ---
 
 Nest.js is a framework designed for building scalable server-side applications. In many ways, Nest is familiar to Angular developers:

docs/shared/packages/react/react-plugin.md

@@ -1,6 +1,7 @@
 ---
 title: React Plugin for Nx
 description: Learn how to use the @nx/react plugin to create and manage React applications and libraries in your Nx workspace, including components, hooks, and more.
+keywords: [react]
 ---
 
 The React plugin contains executors and generators for managing React applications and libraries within an Nx workspace.