projects/cn0579:Add README.md files.

Signed-off-by: Capota Bianca <bianca-ramona.capota@analog.com>

Author: BCapota

projects/cn0579/README.md

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+# CN0579 HDL Project
+
+- Evaluation board product page: [EVAL-CN0579](https://www.analog.com/cn0579)
+- System documentation: https://wiki.analog.com/resources/eval/user-guides/circuits-from-the-lab/cn0579 
+- HDL project documentation: http://analogdevicesinc.github.io/hdl/projects/cn0579/index.html
+
+## Supported parts
+
+| Part name                               | Description                                               |
+|-----------------------------------------|-----------------------------------------------------------|
+| [AD7768-4](https://www.analog.com/AD7768-4) | 4-Channel, 24-Bit, Simultaneous Sampling ADC, Power Scaling, 110.8 kHz BW |
+| [AD5696R](https://www.analog.com/AD5696R) | Quad 16-Bit nanoDAC+ with 2 ppm/°C Reference, I2C Interface |
+
+## Building the project
+
+Please enter the folder for the FPGA carrier you want to use and read the README.md.

projects/cn0579/Readme.md

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+# CN0579/CORAZ7S HDL Project
+
+## Building the project
+
+```
+cd projects/cn0579/coraz7s
+make
+```
+
+Corresponding device tree: [xilinx/zynq-coraz7s-cn0579_i2c.dts](https://github.com/analogdevicesinc/linux/blob/main/arch/arm/boot/dts/xilinx/zynq-coraz7s-cn0579_i2c.dts)

projects/cn0579/coraz7s/README.md

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+# CN0579/DE10NANO HDL Project
+
+## Building the project
+
+```
+cd projects/cn0579/de10nano
+make
+```
+
+Corresponding device tree: [xilinx/socfpga_cyclone5_de10_nano_cn0579_i2c.dts](https://github.com/analogdevicesinc/linux/blob/main/arch/arm/boot/dts/intel/socfpga/socfpga_cyclone5_de10_nano_cn0579_i2c.dts)