refactor(lint): genericize lint-runner dispatch and manifest wording

lint-runner's description already promised other linters could be added
without changing its own contract, but Process hardcoded vale-config/
vale-run and .vale.ini by name. Switch to <linter>-config/<linter>-run
naming-convention dispatch so the promise holds. Drop the explicit
Vale callout from the plugin manifests' description/keywords to match.

Addresses a deferred item from PR #85 review.

plugins/lint/.claude-plugin/plugin.json

@@ -3,16 +3,15 @@
     "name": "Defame1297",
     "url": "https://git.dev.rkdr.net/Defame1297/"
   },
-  "description": "Skills and agents for configuring and running linters, starting with Vale.",
+  "description": "Skills and agents for configuring and running linters.",
   "displayName": "Lint",
   "keywords": [
     "lint",
-    "vale",
     "style",
     "prose",
     "linter"
   ],
   "license": "MIT",
   "name": "lint",
-  "version": "1.1.0"
+  "version": "1.1.1"
 }