Add gridui example

docs/robot/lekce1/example-gridui/@types/adc.d.ts

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+declare module "adc" {
+    type Atten = number;
+
+    const Attenuation: {
+        readonly Db0: Atten;
+        readonly Db2_5: Atten;
+        readonly Db6: Atten;
+        readonly Db11: Atten;
+    };
+
+
+    /**
+     * Enable ADC on the given pin.
+     * @param pin The pin to enable ADC on.
+     */
+    function configure(pin: number, attenuation?: Atten): void;
+
+    /**
+     * Read the value of the given pin.
+     * @param pin The pin to read.
+     * @returns The value of the pin (0-1023)
+     */
+    function read(pin: number): number;
+}

docs/robot/lekce1/example-gridui/@types/basicStream.d.ts

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+declare interface Writable {
+    /**
+     * Write the given data to the stream.
+     * @param data The data to write.
+     */
+    write(data: string): void;
+}
+
+declare interface Readable {
+    /**
+     * Read a single character from the stream.
+     * @returns Promise that resolves to the character read.
+     */
+    get(): Promise<string>;
+
+    /**
+     * Read a chunk of data from the stream. The size of the chunk is
+     * given by the implementation and available data.
+     * @returns Promise that resolves to the data read.
+     */
+    read(): Promise<string>;
+}

docs/robot/lekce1/example-gridui/@types/fs.d.ts

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+declare module "fs" {
+    interface File {
+        path: string;
+
+        /**
+         * Check if the file is open.
+         */
+        isOpen(): boolean;
+
+        /**
+         * Close the file.
+         */
+        close(): void;
+
+        /**
+         * Read characters from the file.
+         * @param len The number of characters to read.
+         */
+        read(len: number): string;
+
+        /**
+         * Write text to the file.
+         * @param text The text to write.
+         */
+        write(text: string): void;
+    }
+
+    /**
+     * Open the given file in the given mode.
+     * @param path The path to the file.
+     * @param mode The mode to open the file in ("r", "w", "a" and combinations).
+     */
+    function open(path: string, mode: string): File;
+
+    /**
+     * Check if the given path exists.
+     * @param path The path to check.
+     * @returns True if the path exists, false otherwise.
+     */
+    function exists(path: string): boolean;
+
+    /**
+     * Check if the given path is a file.
+     * @param path The path to check.
+     * @returns True if the path is a file, false otherwise.
+     */
+    function isFile(path: string): boolean;
+
+    /**
+     * Check if the given path is a directory.
+     * @param path The path to check.
+     * @returns True if the path is a directory, false otherwise.
+     */
+    function isDirectory(path: string): boolean;
+
+    /**
+     * Create a directory at the given path.
+     * @param path The path to create the directory at.
+     */
+    function mkdir(path: string): void;
+
+    /**
+     * Remove the file at the given path.
+     * @param path The path to the file to remove.
+     */
+    function rm(path: string): void;
+
+    /**
+     * Remove the directory at the given path.
+     * @param path The path to the directory to remove.
+     */
+    function rmdir(path: string): void;
+
+    /**
+     * List the files in the given directory.
+     * @param path The path to the directory to list.
+     * @returns An array of file names in the directory.
+     */
+    function readdir(path: string): string[];
+}

docs/robot/lekce1/example-gridui/@types/gpio.d.ts

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+declare module "gpio" {
+    const PinMode: {
+        readonly DISABLE: number,
+        readonly OUTPUT: number,
+        readonly INPUT: number,
+        readonly INPUT_PULLUP: number,
+        readonly INPUT_PULLDOWN: number,
+    };
+
+    interface EventInfo {
+        timestamp: Timestamp;
+    }
+
+    /**
+     * Configure the given pin.
+     * @param pin The pin to configure.
+     * @param mode The mode to configure the pin in.
+     */
+    function pinMode(pin: number, mode: number): void;
+
+    /**
+     * Write digital value to the given pin.
+     * @param pin The pin to write to.
+     * @param value The value to write.
+     */
+    function write(pin: number, value: number): void;
+
+    /**
+     * Read digital value from the given pin.
+     * @param pin The pin to read from.
+     * @returns The value of the pin (0 or 1).
+     */
+    function read(pin: number): number;
+
+    /**
+     * Set event handler for the given pin.
+     * @param event The event to handle.
+     * @param pin The pin to handle the event for.
+     * @param callback The callback to call when the event occurs.
+     */
+    function on(event: "rising" | "falling" | "change", pin: number, callback: (info: EventInfo) => void): void;
+
+    /**
+     * Remove event handler for the given pin.
+     * @param event The event to remove.
+     * @param pin The pin to remove the event handler for.
+     */
+    function off(event: "rising" | "falling" | "change", pin: number): void;
+}