Add errors to eth_capabilities, alphabetize lint rules, ignore schema-title

Author: kclowes

openrpc-lint.yml

@@ -1,14 +1,16 @@
 extends: [recommended]
 rules:
+  error-description:
+    severity: ignore
+  example-description:
+    severity: ignore
   method-description:
     severity: ignore
+  method-summary-length:
+    severity: ignore
   result-description:
     severity: ignore
   schema-description:
     severity: ignore
-  error-description:
-    severity: ignore
-  example-description:
-    severity: ignore
-  method-summary-length:
+  schema-title:
     severity: ignore

src/eth/capabilities.yaml

@@ -5,6 +5,7 @@
     current head block and retention policies for each resource type. This is
     useful for RPC routers to determine which historical queries a node can serve.
   params: []
+  errors: []
   result:
     name: Capabilities
     schema: