feat: full api module building alongside gogo proto files with buf schema registry support (#10669)

* chore: get proto files setup for buf schema registry

* WIP on bsr setup

* WIP

* WIP

* full API module + gogo proto building together

* switch to pulsar

* regen pulsar

* API module builds

* update ver

* cleanup

* update script

* fix api module

* update api

* update buf.yaml

* add docs

* update to pulsar alpha6

Co-authored-by: Marko <marbar3778@yahoo.com>
Co-authored-by: Frojdi Dymylja <33157909+fdymylja@users.noreply.github.com>

testutil/testdata/buf.gen.yaml

@@ -0,0 +1,5 @@
+version: v1
+plugins:
+  - name: gocosmos
+    out: ../..
+    opt: plugins=grpc,Mgoogle/protobuf/any.proto=github.com/cosmos/cosmos-sdk/codec/types

testutil/testdata/buf.lock

@@ -0,0 +1,17 @@
+# Generated by buf. DO NOT EDIT.
+version: v1
+deps:
+  - remote: buf.build
+    owner: cosmos
+    repository: cosmos-proto
+    branch: main
+    commit: 9e9a53f8db0d493f8b8c66d458c767c1
+    digest: b1-6w7Hozd_Oo_yZ1Sku8Nhz9qou-4licLr6VmEyeI9jO4=
+    create_time: 2021-12-02T20:41:47.795828Z
+  - remote: buf.build
+    owner: cosmos
+    repository: gogo-proto
+    branch: main
+    commit: bee5511075b7499da6178d9e4aaa628b
+    digest: b1-rrBIustouD-S80cVoZ_rM0qJsmei9AgbXy9GPQu6vxg=
+    create_time: 2021-12-02T20:01:17.069307Z

testutil/testdata/buf.yaml

@@ -0,0 +1,4 @@
+version: v1
+deps:
+  - buf.build/cosmos/gogo-proto
+  - buf.build/cosmos/cosmos-proto