Use Algolia extension (centralized creds)

Also does the following:

* Update versions for all docs related dependencies
* Use package.json

spring-pulsar-docs/package.json

@@ -0,0 +1,10 @@
+{
+  "dependencies": {
+    "antora": "3.2.0-alpha.4",
+    "@antora/atlas-extension": "1.0.0-alpha.2",
+    "@antora/collector-extension": "1.0.0-alpha.3",
+    "@asciidoctor/tabs": "1.0.0-beta.6",
+    "@springio/antora-extensions": "1.10.0",
+    "@springio/asciidoctor-extensions": "1.0.0-alpha.10"
+  }
+}

spring-pulsar-docs/src/main/antora/antora-playbook.yml

@@ -1,26 +1,17 @@
 antora:
   extensions:
-    - '@springio/antora-extensions/partial-build-extension'
-    - require: '@springio/antora-extensions/latest-version-extension'
-    - require: '@springio/antora-extensions/inject-collector-cache-config-extension'
-    - '@antora/collector-extension'
-    - '@antora/atlas-extension'
-    - require: '@springio/antora-extensions/root-component-extension'
+    - require: '@springio/antora-extensions'
       root_component_name: 'pulsar'
-    - '@springio/antora-extensions/static-page-extension'
-
 site:
   title: Spring Pulsar
   url: https://docs.spring.io/spring-pulsar/reference/
   robots: allow
-
 content:
   sources:
     - url: ./../../../../
       branches: HEAD
       start_path: spring-pulsar-docs/src/main/antora
       worktrees: true
-
 asciidoc:
   attributes:
     page-stackoverflow-url: https://stackoverflow.com/tags/spring-pulsar
@@ -32,17 +23,14 @@ asciidoc:
     - '@asciidoctor/tabs'
     - '@springio/asciidoctor-extensions'
   sourcemap: true
-
 urls:
   latest_version_segment_strategy: redirect:to
   latest_version_segment: ''
   redirect_facility: httpd
-
 ui:
   bundle:
-    url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.14/ui-bundle.zip
+    url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.16/ui-bundle.zip
     snapshot: true
-
 runtime:
   log:
     failure_level: warn