Add uart.write action (#567)

* Add uart.write action

* Lint

esphome/components/uart/automation.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include "uart.h"
+#include "esphome/core/automation.h"
+
+namespace esphome {
+namespace uart {
+
+template<typename... Ts> class UARTWriteAction : public Action<Ts...>, public Parented<UARTComponent> {
+ public:
+  void set_data_template(std::function<std::vector<uint8_t>(Ts...)> func) {
+    this->data_func_ = func;
+    this->static_ = false;
+  }
+  void set_data_static(const std::vector<uint8_t> &data) {
+    this->data_static_ = data;
+    this->static_ = true;
+  }
+
+  void play(Ts... x) override {
+    if (this->static_) {
+      this->parent_->write_array(this->data_static_);
+    } else {
+      auto val = this->data_func_(x...);
+      this->parent_->write_array(val);
+    }
+  }
+
+ protected:
+  bool static_{false};
+  std::function<std::vector<uint8_t>(Ts...)> data_func_{};
+  std::vector<uint8_t> data_static_{};
+};
+
+}  // namespace uart
+}  // namespace esphome