chore: add knip and remove dead code (#437)

Author: Anshumancanrock

.knip.json

@@ -0,0 +1,19 @@
+{
+  "$schema": "https://unpkg.com/knip@2/schema.json",
+  "entry": [
+    "src/index.ts",
+    "src/import-events.ts",
+    "knexfile.js"
+  ],
+  "project": [
+    "src/**/*.ts"
+  ],
+  "ignoreFiles": [],
+  "commitlint": false,
+  "eslint": false,
+  "github-actions": false,
+  "husky": false,
+  "mocha": false,
+  "nyc": false,
+  "semantic-release": false
+}

CONTRIBUTING.md

@@ -6,6 +6,16 @@ before making a change.
 
 Please keep the conversations civil, respectful and focus on the topic being discussed.
 
+## Local Quality Checks
+
+Run dead code and dependency analysis before opening a pull request:
+
+```
+npm run knip
+```
+
+`npm run lint` now runs Knip first, then ESLint.
+
 ## Pull Request Process
 
 1. Update the relevant documentation with details of changes to the interface, this includes new environment