[tcp_uart] Add a TCP client that implements a UART (#19884)

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
Co-authored-by: J. Nick Koston <nick@home-assistant.io>

tests/components/tcp_uart/common.yaml

@@ -0,0 +1,20 @@
+wifi:
+  ssid: MySSID
+  password: password1
+
+tcp_uart:
+  - id: tcp_uart_1
+    host: 192.0.2.10
+    port: 502
+    reconnect_interval: 10s
+    connected:
+      name: TCP UART Connected
+
+interval:
+  - interval: 60s
+    then:
+      - lambda: |-
+          uint8_t byte;
+          if (id(tcp_uart_1).available() && id(tcp_uart_1).read_byte(&byte)) {
+            id(tcp_uart_1).write_byte(byte);
+          }

tests/components/tcp_uart/test.bk72xx-ard.yaml

@@ -0,0 +1,2 @@
+packages:
+  tcp_uart: !include common.yaml

tests/components/tcp_uart/test.esp32-idf.yaml

@@ -0,0 +1,2 @@
+packages:
+  tcp_uart: !include common.yaml

tests/components/tcp_uart/test.esp8266-ard.yaml

@@ -0,0 +1,2 @@
+packages:
+  tcp_uart: !include common.yaml

tests/components/tcp_uart/test.host.yaml

@@ -0,0 +1,4 @@
+packages:
+  tcp_uart: !include common.yaml
+
+wifi: !remove

tests/components/tcp_uart/test.ln882x-ard.yaml

@@ -0,0 +1,2 @@
+packages:
+  tcp_uart: !include common.yaml

tests/components/tcp_uart/test.rp2040-ard.yaml

@@ -0,0 +1,2 @@
+packages:
+  tcp_uart: !include common.yaml

tests/components/tcp_uart/test.rtl87xx-ard.yaml

@@ -0,0 +1,2 @@
+packages:
+  tcp_uart: !include common.yaml