Import ESP_UniClock (upstream 1189810)

Vendored from https://github.com/gpeter62/ESP_UniClock: the sketch
source, the web UI and the libraries the ESP8266 build needs, unpacked
from the bundled zips. Adds a PlatformIO project for the ESP-12. The
source is unchanged; local changes follow as separate commits.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

firmware/uniclock/lib/ESPAsyncWebServer/.travis.yml

@@ -0,0 +1,46 @@
+sudo: false
+
+language: python
+
+os:
+  - linux
+
+git:
+  depth: false
+
+stages:
+  - build
+
+jobs:
+  include:
+
+    - name: "Build Arduino ESP32"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: bash $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh esp32
+
+    - name: "Build Arduino ESP8266"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: bash $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh esp8266
+
+    - name: "Build Platformio ESP32"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: bash $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh esp32 1 1
+
+    - name: "Build Platformio ESP8266"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: bash $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh esp8266 1 1
+
+notifications:
+  email:
+    on_success: change
+    on_failure: change
+  webhooks:
+    urls:
+      - https://webhooks.gitter.im/e/60e65d0c78ea0a920347
+    on_success: change  # options: [always|never|change] default: always
+    on_failure: always  # options: [always|never|change] default: always
+    on_start: never     # options: [always|never|change] default: always