add validate task

Taskfile.yml

@@ -11,4 +11,16 @@ tasks:
                 sh: echo {{.SCHEMA}} | perl -pe's/ya?ml/json/g'
         sources: ["{{.SCHEMA}}"]
         generates: ["{{.DEST}}"]
-        cmds: transerialize {{.SCHEMA}} {{.DEST}}
+        cmds:
+            - transerialize {{.SCHEMA}} {{.DEST}}
+
+    validate:
+        silent: true
+        cmds:
+            - |
+                ajv validate \
+                    --all-errors \
+                    --errors=json \
+                    --verbose \
+                    -s schemas-yaml/character.yml \
+                    -d {{.CLI_ARGS}}