Added additional templates, pending for app-config

Author: adityasinghal26

backstage-app/backstage101/examples/all-templates.yaml

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+apiVersion: backstage.io/v1alpha1
+kind: Location
+metadata:
+  name: example-templates
+  description: A collection of all Backstage example templates
+spec:
+  targets:
+    - ./remote-templates.yaml
+# For local development of a template, you can reference your local templates here.
+# Examples:
+#
+#   - ./local-template/template.yaml
+#   - ../all-templates/local/template.yaml

backstage-app/backstage101/examples/remote-templates.yaml

@@ -0,0 +1,13 @@
+apiVersion: backstage.io/v1alpha1
+kind: Location
+metadata:
+  name: example-templates-remote
+  description: A collection of remotely available Backstage example templates
+spec:
+  type: url
+  targets:
+    - https://github.com/backstage/software-templates/blob/main/scaffolder-templates/create-react-app/template.yaml
+    - https://github.com/backstage/software-templates/blob/main/scaffolder-templates/docs-template/template.yaml
+    - https://github.com/backstage/software-templates/blob/main/scaffolder-templates/pull-request/template.yaml
+    - https://github.com/backstage/software-templates/blob/main/scaffolder-templates/react-ssr-template/template.yaml
+    - https://github.com/backstage/software-templates/blob/main/scaffolder-templates/springboot-grpc-template/template.yaml