Document we are not currently accepting new instrumentation probe PRs

.github/ISSUE_TEMPLATE/new_instrumentation.yaml

@@ -0,0 +1,60 @@
+name: New Instrumentation
+about: Request new instrumentation be added to the project
+title: 'New Instrumentation Request for <PACKAGE>'
+labels:
+  - enhancement
+  - new instrumentation
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this new instrumentation request!
+  - type: checkboxes
+    attributes:
+      label: Is there an existing issue for this?
+      description: |
+        Please search to see if an issue already exists for the instrumentation.
+
+        If one already exists, add a 👍 to that issue and your use-case if it is not already captured.
+      options:
+      - label: I have searched the existing issues
+  - type: textarea
+    attributes:
+      label: Package
+      description: What is the name of the Go package?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Version
+      description: What version of the package do you use?
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Environment
+      description: How do you normally run applications built with the package?
+      placeholder: As a Deployment on Kubernetes 1.30
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Use-case
+      description: What kind of applications do you build with the package?
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Telemetry
+      description: What telemetry you would like to see for for the package?
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Anything else?
+      description: |
+        Links? References? Anything that will give us more context!
+
+        Tip: You can attach images or log files by clicking this area to highlight it and then dragging files in.
+    validations:
+      required: false

CONTRIBUTING.md

@@ -37,6 +37,18 @@ Questions, bug reports, and feature requests can all be submitted as [issues](ht
 
 ## Pull Requests
 
+> [!NOTE]
+> We are currently **not** accepting PRs to add new instrumentation probes. A
+> new [instrumentation probe API] is being designed. To avoid excessive churn
+> and development burden, we will not be accepting new instrumentation probes
+> until that API is completed.
+> 
+> Please **do** [open an issue] to track your request for new instrumentation.
+> We would like to know what we are missing and how you plan to use it.
+
+[open an issue]: https://github.com/open-telemetry/opentelemetry-go-instrumentation/issues/new?template=new_instrumentation.yaml
+[instrumentation API]: https://github.com/open-telemetry/opentelemetry-go-instrumentation/issues/1105 
+
 ### How to Send Pull Requests
 
 Everyone is welcome to contribute code to `opentelemetry-go-instrumentation` via