roll: third_party/pigweed: pw_web: Update REPL styles

Changelist:
- Update icons to include play_arrow and stop
- Update light and dark styles for REPL
- Add stdin in output
- Fix scroll overflow for output
- Keep scrollbar at end when output overflows

Original-Bug: 348650028
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/220971
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 2f86c6dfec93ea9..e6ad28bbb6ac1c6
Roller-URL: https://ci.chromium.org/b/8742733702688461009
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id2f272cb9aaef825ab9f733e08d1be1281d01f9d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/221537
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 2f86c6d..e6ad28b 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 2f86c6dfec93ea9dbef06a2a84a9878dc4c25e11
+Subproject commit e6ad28bbb6ac1c61c7603fba8be460fcc724d3d6