alif/boards/ALIF_ENSEMBLE: Add board.json and deploy instructions.

The firmware for this board will now be built and available automatically.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

ports/alif/boards/ALIF_ENSEMBLE/board.json

@@ -0,0 +1,17 @@
+{
+    "deploy": [
+        "./deploy.md"
+    ],
+    "docs": "",
+    "features": [
+        "Ethernet"
+    ],
+    "images": [
+        "ensemble-devkit-gen-2.jpg"
+    ],
+    "mcu": "AE722F80F55D5XX",
+    "product": "Ensemble E7 DevKit",
+    "thumbnail": "",
+    "url": "https://alifsemi.com/support/kits/ensemble-devkit/",
+    "vendor": "Alif Semiconductor"
+}

ports/alif/boards/ALIF_ENSEMBLE/deploy.md

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+### Alif Security Toolkit
+
+This board can be programmed via the SE UART interface using the Alif Security
+Toolkit. MicroPython uses a custom version of the toolkit, which can be downloaded
+from [here](https://github.com/micropython/alif-security-toolkit/) or cloned:
+
+```bash
+git clone https://github.com/micropython/alif-security-toolkit/
+```
+
+---
+
+### Update the SE Firmware (Optional)
+
+If needed, update the SE firmware to match the version used by MicroPython. Ensure
+you have the correct port, part number, and chip revision.
+
+```bash
+python alif-security-toolkit/toolkit/updateSystemPackage.py --port /dev/ttyACM0 --cfg-part AE722F80F55D5LS --cfg-rev B4
+```
+
+**Note:** The board must be power-cycled after this step.
+
+---
+
+### Deploy MicroPython
+
+Download (or build) the firmware package, unzip it, then deploy it:
+
+```bash
+
+python alif-security-toolkit/toolkit/app-write-mram.py --port /dev/ttyACM0 --cfg-part AE722F80F55D5LS --cfg-rev B4 --pad --images file:build-ALIF_ENSEMBLE/application_package.ds
+```
+
+The MicroPython REPL is available on the second USB serial port, eg `/dev/ttyACM1`.
+
+---