chore: Add typescript support to eslint, fix errors (#2923)

docs/src/keymap-upgrade/headers.ts

@@ -1,4 +1,4 @@
-import type { SyntaxNode, Tree } from "web-tree-sitter";
+import type { Tree } from "web-tree-sitter";
 import { Devicetree, findCapture } from "./parser";
 import { getUpgradeEdits, MatchFunc, ReplaceFunc, TextEdit } from "./textedit";
 

docs/src/keymap-upgrade/keycodes.ts

@@ -142,7 +142,7 @@ function findBehaviorNodes(paramNode: SyntaxNode) {
   }
 
   // Walk forward from the behavior to collect all its parameters.
-  let nodes = [behavior];
+  const nodes = [behavior];
   let param = behavior.nextNamedSibling;
   while (param && param.type !== "reference") {
     nodes.push(param);

docs/src/keymap-upgrade/parser.ts

@@ -133,7 +133,9 @@ export function findDevicetreeProperty(
     `(property name: (identifier) @name (#eq? @name "${name}")) @prop`
   );
   const matches = query.matches(node);
-  const props = matches.map(({ captures }) => findCapture("prop", captures)!);
+  const props = matches
+    .map(({ captures }) => findCapture("prop", captures))
+    .filter((node) => node !== null);
 
   if (options?.recursive) {
     return props;

docs/src/keymap-upgrade/textedit.ts

@@ -94,7 +94,7 @@ export function applyEdits(text: string, edits: TextEdit[]) {
   const chunks: TextChunk[] = [];
   let currentIndex = 0;
 
-  for (let edit of edits) {
+  for (const edit of edits) {
     if (edit.startIndex < currentIndex) {
       console.warn("discarding overlapping edit", edit);
       continue;