Add temporary readme

README.md

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+# Help Needed !
+
+See: https://github.com/espressif/arduino-esp32/discussions/10039
+
+Add these in an existing project:
+```
+[env:pioarduino-esp32dev]
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.03/platform-espressif32.zip
+board = esp32dev
+
+[env:pioarduino-esp32-s2]
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.03/platform-espressif32.zip
+board = esp32-s2-saola-1
+
+[env:pioarduino-esp32-s3]
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.03/platform-espressif32.zip
+board = esp32-s3-devkitc-1
+
+[env:pioarduino-esp32-c3]
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.03/platform-espressif32.zip
+board = esp32-c3-devkitc-02
+
+[env:pioarduino-esp32-c6]
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.03/platform-espressif32.zip
+board = esp32-c6-devkitc-1
+```
+
+Then run:
+
+```bash
+# cleanup existing packages
+rm ~/.platformio/packages
+# build
+for e in `pio project config --json-output | jq -cr '.[][0] | select(startswith("env:pioarduino-")) | .[4:]'`; do pio run -e $e; done;
+# compress
+cd ~/.platformio/packages
+ls | grep -v framework | grep -v zip | xargs -n1 -I {} zip -s 100m -r {}.zip {}
+# double check your architecture:
+uname -a
+```
+
+Fork this repo.
+
+Then move all the generated zip and zxx files inside your fork, in the right folder.
+Push, PR, :+1:
+
+As an example, this accounts for about 750Mb for macos_arm64.