ESP-IDF support and generic target platforms (#2303)

* Socket refactor and SSL

* esp-idf temp

* Fixes

* Echo component and noise

* Add noise API transport support

* Updates

* ESP-IDF

* Complete

* Fixes

* Fixes

* Versions update

* New i2c APIs

* Complete i2c refactor

* SPI migration

* Revert ESP Preferences migration, too complex for now

* OTA support

* Remove echo again

* Remove ssl again

* GPIOFlags updates

* Rename esphal and ICACHE_RAM_ATTR

* Make ESP32 arduino compilable again

* Fix GPIO flags

* Complete pin registry refactor and fixes

* Fixes to make test1 compile

* Remove sdkconfig file

* Ignore sdkconfig file

* Fixes in reviewing

* Make test2 compile

* Make test4 compile

* Make test5 compile

* Run clang-format

* Fix lint errors

* Use esp-idf APIs instead of btStart

* Another round of fixes

* Start implementing ESP8266

* Make test3 compile

* Guard esp8266 code

* Lint

* Reformat

* Fixes

* Fixes v2

* more fixes

* ESP-IDF tidy target

* Convert ARDUINO_ARCH_ESPxx

* Update WiFiSignalSensor

* Update time ifdefs

* OTA needs millis from hal

* RestartSwitch needs delay from hal

* ESP-IDF Uart

* Fix OTA blank password

* Allow setting sdkconfig

* Fix idf partitions and allow setting sdkconfig from yaml

* Re-add read/write compat APIs and fix esp8266 uart

* Fix esp8266 store log strings in flash

* Fix ESP32 arduino preferences not initialized

* Update ifdefs

* Change how sdkconfig change is detected

* Add checks to ci-custom and fix them

* Run clang-format

* Add esp-idf clang-tidy target and fix errors

* Fixes from clang-tidy idf round 2

* Fixes from compiling tests with esp-idf

* Run clang-format

* Switch test5.yaml to esp-idf

* Implement ESP8266 Preferences

* Lint

* Re-do PIO package version selection a bit

* Fix arduinoespressif32 package version

* Fix unit tests

* Lint

* Lint fixes

* Fix readv/writev not defined

* Fix graphing component

* Re-add all old options from core/config.py

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/mdns/mdns_component.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <string>
+#include <vector>
+#include "esphome/core/component.h"
+
+namespace esphome {
+namespace mdns {
+
+struct MDNSTXTRecord {
+  std::string key;
+  std::string value;
+};
+
+struct MDNSService {
+  std::string service_type;
+  std::string proto;
+  uint16_t port;
+  std::vector<MDNSTXTRecord> txt_records;
+};
+
+class MDNSComponent : public Component {
+ public:
+  void setup() override;
+
+#if defined(USE_ESP8266) && defined(USE_ARDUINO)
+  void loop() override;
+#endif
+  float get_setup_priority() const override { return setup_priority::AFTER_WIFI; }
+
+ protected:
+  std::vector<MDNSService> compile_services_();
+  std::string compile_hostname_();
+};
+
+}  // namespace mdns
+}  // namespace esphome