add kiss radio env to most of the variants

variants/ebyte_eora_s3/platformio.ini

@@ -135,3 +135,8 @@ build_src_filter = ${Ebyte_EoRa-S3.build_src_filter}
 lib_deps =
   ${Ebyte_EoRa-S3.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Ebyte_EoRa-S3_kiss_modem]
+extends = Ebyte_EoRa-S3
+build_src_filter = ${Ebyte_EoRa-S3.build_src_filter}
+  +<../examples/kiss_modem/>