fix: deep imports from day-js need .js extension (#165)

* fix: deep imports from day-js need .js extension

dayjs/plugin/relativeTime is a deep file path import into the dayjs package. The dayjs package doesn't have an exports map entry for every plugin, so webpack has to resolve it as an actual file path. In strict ESM mode, that requires the .js extension.

* Update deep import message for day-js in devtools

* ci: apply automated fixes

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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

Author: TkDodo

.changeset/proud-maps-scream.md

@@ -0,0 +1,5 @@
+---
+'@tanstack/pacer-devtools': patch
+---
+
+fix(devtools): deep imports from day-js need .js extension

packages/pacer-devtools/src/components/StateHeader.tsx

@@ -1,5 +1,5 @@
 import dayjs from 'dayjs'
-import relativeTime from 'dayjs/plugin/relativeTime'
+import relativeTime from 'dayjs/plugin/relativeTime.js'
 import { createSignal, onCleanup, onMount } from 'solid-js'
 import { useStyles } from '../styles/use-styles'