feat(angular/metadata): add content to the threads (#6304)

Threads:
- Metadata
- Selector
- Template
- Styles
- Standalone
- Imports
- Provider

src/data/roadmaps/angular/content/imports@ghbrJhuGvscnNGCtVLh5_.md

@@ -1 +1,9 @@
 # Imports
+
+The `imports` property specifies the `standalone` component's template dependencies — those directives, components, and
+pipes that can be used within its template.
+
+Visit the following resources to learn more:
+
+- [@official@Importing and using components](https://angular.dev/guide/components/importing)
+- [@official@Component - API](https://angular.dev/api/core/Component#imports)

src/data/roadmaps/angular/content/metadata@Szgr8dnZNi-z5i6raIJzW.md

@@ -1 +1,9 @@
 # Metadata
+
+Metadata in Angular components refers to the configuration information that is used to define and configure the behavior
+of a component. It is specified using decorators, which are functions that add metadata to classes, properties, and
+methods.
+
+Visit the following resources to learn more:
+
+- [@official@Component - API](https://angular.dev/api/core/Component)

src/data/roadmaps/angular/content/provider@dOMvz__EQjO-3p-Nzm-7P.md

@@ -1 +1,8 @@
 # Provider
+
+Configure the injector of component with a token that maps to a provider of a dependency.
+
+Visit the following resources to learn more:
+
+- [@official@Configuring dependency providers](https://angular.dev/guide/di/dependency-injection-providers)
+- [@official@Component - API](https://angular.dev/api/core/Component#providers)

src/data/roadmaps/angular/content/selector@cDN0PGo-zkcLmttxCiAI-.md

@@ -1 +1,10 @@
 # Selector
+
+In Angular, the `selector` metadata is a crucial property defined within the `@Component` decorator that specifies how the
+component can be identified and used in HTML templates. It determines the way the component is rendered in the DOM,
+allowing developers to create reusable and easily identifiable components.
+
+Visit the following resources to learn more:
+
+- [@official@Component selectors](https://angular.dev/guide/components/selectors)
+- [@official@Component - API](https://angular.dev/api/core/Component#selector)

src/data/roadmaps/angular/content/standalone@RcNHEh6kmbBK1PICbhAwr.md

@@ -1 +1,9 @@
 # Standalone
+
+A standalone component is a component that sets `standalone: true` in its component metadata. Standalone components
+directly import other components, directives, and pipes used in their templates
+
+Visit the following resources to learn more:
+
+- [@official@Standalone components](https://angular.dev/guide/components/importing#standalone-components)
+- [@official@Component - API](https://angular.dev/api/core/Component#standalone)

src/data/roadmaps/angular/content/styles@4XJKEmSrQfPxggHlAP30w.md

@@ -1 +1,9 @@
 # Styles
+
+This metadata allows developers to apply CSS styles directly to a component, enhancing its appearance and ensuring that
+styles are scoped to that particular component.
+
+Visit the following resources to learn more:
+
+- [@official@Styling components](https://angular.dev/guide/components/styling)
+- [@official@Component - API](https://angular.dev/api/core/Component#styles)

src/data/roadmaps/angular/content/template@-gUpm3OLUJl9iAyx6fmHN.md

@@ -1 +1,9 @@
 # Template
+
+`template` metadata is a property defined within the `@Component` decorator that specifies the HTML template for the
+component. It allows you to define the structure and layout of the component's view.
+
+Visit the following resources to learn more:
+
+- [@official@Template syntax](https://angular.dev/guide/templates)
+- [@official@Component - API](https://angular.dev/api/core/Component#template)