chore: readme not sym

README.md

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+AS OF RIGHT NOW THIS IS ONLY USEFUL FOR `IBS-M2` POOL SENSOR. It's a hacky approach to limitations with the tuya apigw repo.
+
+# Why
+
+This is all just a workaround to a breaking API change: https://github.com/tuya/tuya-device-sharing-sdk/issues/11
+
+I'd ideally like to merge this PR: https://github.com/home-assistant/core/pull/113214
+into the base Tuya integration, but the API change means the non-standard data points aren't available in home assistant.
+
+# What
+I forked an old version of the HA repo, using the legacy Tuya SDK.