feat(field_info): update field-info extension id (#45)

the field_info extension ID was not using the global extensions
allocated to aep.dev (as documented in
https://github.com/protocolbuffers/protobuf/blob/main/docs/options.md).

Fixing that discrepancy, as well as some incorrect documentation.

Author: toumorokoshi

README.md

@@ -9,6 +9,6 @@ Common types used in AEPs
 
 ## Protobuf Extensions
 
-aep.dev has registered the extension ids 1253-1263 with the [global extension registry](https://github.com/protocolbuffers/protobuf/blob/main/docs/options.md). Any extensions added to this project should use these values.
+aep.dev has registered the extension ids 1264-1274 with the [global extension registry](https://github.com/protocolbuffers/protobuf/blob/main/docs/options.md). Any extensions added to this project should use these values.
 
 To minimize the need to add new ids to the global registry, additions should try to re-use the existing extensions as much as possible (for example, additional field annotations should be added as fields to `aep.api.field_info`).

proto/aep-api/aep/api/field_info.proto

@@ -15,7 +15,7 @@ import "aep/api/field_behavior.proto";
 // A field option documenting the applicable lifetime of a field, e.g. an
 // idempotency key.
 extend google.protobuf.FieldOptions {
-  FieldInfo field_info = 10520;
+  FieldInfo field_info = 1265;
 }
 
 // Various options related to the behavior of a field.