espressif:esp32s3: Add esp32s3 initial support

ESP32-S3 target and related files added to the Espressif port.

Signed-off-by: Almir Okato <almir.okato@espressif.com>
diff --git a/.github/workflows/espressif.yaml b/.github/workflows/espressif.yaml
index 09870f5..5996407 100644
--- a/.github/workflows/espressif.yaml
+++ b/.github/workflows/espressif.yaml
@@ -18,7 +18,7 @@
   environment:
     strategy:
       matrix:
-        targets: [esp32, esp32s2, esp32c3]
+        targets: [esp32, esp32s2, esp32s3, esp32c3]
         features:
         - "sign-rsa2048,sign-rsa3072,sign-ec256,sign-ed25519"
     runs-on: ubuntu-latest