Add 2.9 inch EPD support

platformio.ini

@@ -9,6 +9,7 @@
 ; https://docs.platformio.org/page/projectconf.html
 [platformio]
 data_dir = data/build_gz
+default_envs = lolin_s3_mini_213epd, lolin_s3_mini_29epd
 
 [env]
 
@@ -55,12 +56,21 @@ build_flags =
 build_unflags = 
   ${btclock_base.build_unflags}
 
-[env:lolin_s3_mini_qr]
+[env:lolin_s3_mini_213epd]
 extends = env:lolin_s3_mini
 test_framework = unity
 build_flags =
     ${env:lolin_s3_mini.build_flags}
     -D USE_QR
+    -D VERSION_EPD_2_13
+
+[env:lolin_s3_mini_29epd]
+extends = env:lolin_s3_mini
+test_framework = unity
+build_flags =
+    ${env:lolin_s3_mini.build_flags}
+    -D USE_QR
+    -D VERSION_EPD_2_9
 
 [env:btclock_s3]
 extends = btclock_base