Translate subcategory names and other main texts

There is some text to translate that is not in this repository's content. Please translate the following list of words and add the translation as a reply here:

- Arduino Reference
- The Arduino programming language Reference, organized into Functions, Variable and Constant, and Structure keywords.
- functions
- For controlling the Arduino board and performing computations.
- Digital I/O
- Analog I/O
- Zero, Due & MKR Family
- Advanced I/O
- Time
- Math
- Trigonometry
- Characters
- Random Numbers
- Bits and Bytes
- External Interrupts
- Interrupts
- Communication
- Serial
- Stream
- USB
- Keyboard
- Mouse
- variables
- Arduino data types and constants.
- Constants
- Conversion
- Data Types
- Variable Scope & Qualifiers
- Utilities
- structure
- The elements of Arduino (C++) code.
- Sketch
- Control Structure
- Further Syntax
- Arithmetic Operators
- Comparison Operators
- Boolean Operators
- Pointer Access Operators
- Bitwise Operators
- Compound Operators

Use the issue's listed Arduino Reference terms as the source text; translate every item into the repository's target language and post the complete list as a reply. Done means each heading and description has a corresponding translation.

Written by the indexing model from the issue text.