Added simple docs sketch

esp_modem/docs/c_api.h

@@ -0,0 +1,50 @@
+// cat ../include/generate/esp_modem_command_declare.inc | clang -E -P -CC  -xc -I../include -DGENERATE_DOCS  - | sed -n '1,/DCE command documentation/!p' > c_api.h
+//  --- DCE command documentation starts here ---
+/**
+ * @brief Sends the supplied PIN code
+ *
+ * @param pin Pin
+ *
+ */ command_result esp_modem_set_pin (const char* pin); /**
+ * @brief Checks if the SIM needs a PIN
+ *
+ * @param[out] pin_ok Pin
+ */ command_result esp_modem_read_pin (bool* pin_ok); /**
+ * @brief Reads the module name
+ *
+ * @param[out] name module name
+ */ command_result esp_modem_set_echo (const bool x); /**
+ * @brief Reads the module name
+ *
+ * @param[out] name module name
+ */ command_result esp_modem_resume_data_mode (); /**
+ * @brief Reads the module name
+ *
+ * @param[out] name module name
+ */ command_result esp_modem_set_pdp_context (struct PdpContext* x); /**
+ * @brief Reads the module name
+ *
+ * @param[out] name module name
+ */ command_result esp_modem_set_command_mode (); /**
+ * @brief Reads the module name
+ *
+ * @param[out] name module name
+ */ command_result esp_modem_set_cmux (); /**
+ * @brief Reads the module name
+ *
+ * @param[out] name module name
+ */ command_result esp_modem_get_imsi (char* x); /**
+ * @brief Reads the module name
+ *
+ * @param[out] name module name
+ */ command_result esp_modem_get_imei (char* x); /**
+ * @brief Reads the module name
+ *
+ * @param[out] name module name
+ */ command_result esp_modem_get_module_name (char* name); /**
+ * @brief Sets the modem to data mode
+ *
+ */ command_result esp_modem_set_data_mode (); /**
+ * @brief Get Signal quality
+ *
+ */ command_result esp_modem_get_signal_quality (int* x, int* y);