[roll third_party/pigweed] pw_console: Default to 24bit color depth

Set 24bit colors by default unless:
- PROMPT_TOOLKIT_COLOR_DEPTH environment variable is set
- Running on Mac with Apple Terminal

Test: Run `pw console --test-mode` on Windows/Mac/Linux
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/56800

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 60ff85ae21b5d7d..88b36ebe4699e10
Roller-URL: https://ci.chromium.org/b/8839240910280753184
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8839240910280753184
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6a42d749fcfe2ed97d4490106e1bc064f7411de8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/56783
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 60ff85a..88b36eb 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 60ff85ae21b5d7d3afcd3a40b7dacefefb76d307
+Subproject commit 88b36ebe4699e101c793ce89f2e9fa113451f4c3