feat(touch): update doc and example for touch version 2

docs/en/api-reference/peripherals/cap_touch_sens/esp32s3.inc

@@ -0,0 +1,64 @@
+.. This file gets included from other .rst files in this folder.
+.. It contains target-specific snippets.
+.. Comments and '---' lines act as delimiters.
+..
+.. This is necessary mainly because RST doesn't support substitutions
+.. (defined in RST, not in Python) inside code blocks. If that is ever implemented,
+.. These code blocks can be moved back to the main .rst files, with target-specific
+.. file names being replaced by substitutions.
+
+.. touch-chan-mapping
+
+.. list-table::
+    :header-rows: 1
+    :widths: 20  20
+
+    * - Channel
+      - GPIO
+
+    * - CH0
+      - Internal
+
+    * - CH1
+      - IO1
+
+    * - CH2
+      - IO2
+
+    * - CH3
+      - IO3
+
+    * - CH4
+      - IO4
+
+    * - CH5
+      - IO5
+
+    * - CH6
+      - IO6
+
+    * - CH7
+      - IO7
+
+    * - CH8
+      - IO8
+
+    * - CH9
+      - IO9
+
+    * - CH10
+      - IO10
+
+    * - CH11
+      - IO11
+
+    * - CH12
+      - IO12
+
+    * - CH13
+      - IO13
+
+    * - CH14
+      - IO14
+
+---