Interrups with I2C

**Describe the problem you have/What new integration you would like**

Make it possible to use the interrupt pin of I2C I/O extensions.

**Please describe your use case for this integration and alternatives you've tried:**

Using a I2C I/O extension in polling mode, makes it slow. When using for instance an input for a counter or a rotary encoder knob, it will miss pulses. When the I2C I/O extensions can report the I/O change to the processor by interrupt, the I2C buss can be read and processed at the moment the change happens.

**Additional context**

Example: An rotary encoder for change settings will generate up to 10 pulse a second. Polling every 1 seconds will loss a lot of pulses.