Examples of 1.x move to examples/legacy, one sketch folder each

basicLight, lightWithBrightness, lightWithColorTemp, tempSensor and blindControl become
examples/legacy/<name>/<name>.ino, which the Arduino IDE and PlatformIO both open. Their content is
unchanged: they keep proving that a 1.x sketch compiles against 2.0, and their discovery tests
(test/test_discovery) are untouched.

Built for d1_mini from the sketch folders, 0 warnings each; basicLight takes 30,520 bytes of static
RAM and 333,989 of flash, the same as before the move. library.json and the readme name the new
place.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

library.json

@@ -30,7 +30,8 @@
     ],
     "headers": "Alex2ESP.h",
     "examples": [
-        "examples/*.cpp"
+        "examples/*/*.ino",
+        "examples/legacy/*/*.ino"
     ],
     "dependencies": [
         {