chore: add Essential Building Blocks working group

WORKING_GROUPS.yaml

@@ -26,3 +26,17 @@ working_groups:
     roadmap_url: https://shapeit.app/projects/org/asyncapi/16
     okrs_url: https://github.com/users/Amzani/projects/12/views/1
     github_team: @asyncapi/developer_experience_wg
+  - name: Essential Building Blocks
+    description: The goal of the Essential Building Blocks Working Group is to build fundamental building blocks that enable a same developer experience across languages.
+    chairperson: @jonaslagoni
+    members:
+      - @m-wild
+      - @lorenzsimon
+      - @VisualBean
+      - @Pakisan
+      - @Souvikns
+      - @jonaslagoni
+    slack_channel: TBD
+    roadmap_url: TBD
+    okrs_url: TBD
+    github_team: TBD