Add multilingual language and systems learning tracks

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+<!doctype html><html lang="en"><meta charset="utf-8"><title>Build the public kernel prototype</title><h1>Build the public kernel prototype</h1><p>15-minute session: read for 3 minutes, trace for 3, experiment for 7, and complete the check for 2. Spend longer whenever you need.</p><p>The public open_kernel repository uses Ada, kernel.gpr, and a Makefile. make run builds and executes a host program. It is not a bootable bare-metal image. Main calls Kernel.Start. Inspect the current source before changing it; the reference revision is 9af96aa.</p><p><strong>Practice and evidence:</strong> Clone from Forge in your development environment, install GNAT and gprbuild, run make and make run, and record the exact commit and output. The browser lab is single-file; use your own development environment for this multi-file build.</p><h3>Practice and evidence</h3><p>Keep three notes: your prediction, the actual result, and why they match or differ. The completion check grades understanding; the practice task builds skill.</p><p><a href="https://git.agilaos.com/matt/open_kernel">Language reference: git.agilaos.com</a></p><p><a href="https://git.agilaos.com/matt/agila_open_tool">Language reference: git.agilaos.com</a></p></html>