Move api-spec to root folder (#242)

* api-spec: move the api-spec to root and init go.mod

* go mod tidy

* move buf files in the root as well

* gh action for api-spec changes only

* gh action for api-spec on push and pr

.github/workflows/ark.proto.yaml

@@ -0,0 +1,27 @@
+name: API Spec Changes
+
+on:
+  push:
+    branches: 
+      - master
+    paths:
+      - "api-spec/**"
+  pull_request:
+    branches:
+      - master
+    paths:
+      - "api-spec/**"
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - uses: bufbuild/buf-setup-action@v1.3.1
+      
+      - name: check proto linting
+        run: buf lint

.github/workflows/ark.unit.yaml

@@ -34,9 +34,6 @@ jobs:
         uses: securego/gosec@master
         with:
           args: '-severity high -quiet ./...'
-      - uses: bufbuild/buf-setup-action@v1.3.1
-      - name: check proto linting
-        run: buf lint
       - run: go get -v -t -d ./...
       - name: unit testing
         run: make test