Red Bear OS — microkernel OS in Rust, based on Redox

Derivative of Redox OS (https://www.redox-os.org) adding:
- AMD GPU driver (amdgpu) via LinuxKPI compat layer
- ext4 filesystem support (ext4d scheme daemon)
- ACPI fixes for AMD bare metal (x2APIC, DMAR, IVRS, MCFG)
- Custom branding (hostname, os-release, boot identity)

Build system is full upstream Redox with RBOS overlay in local/.
Patches for kernel, base, and relibc are symlinked from local/patches/
and protected from make clean/distclean. Custom recipes live in
local/recipes/ with symlinks into the recipes/ search path.

Build:  make all CONFIG_NAME=redbear-full
Sync:   ./local/scripts/sync-upstream.sh

.gitlab/merge_request_templates/Merge_request_template.md

@@ -0,0 +1,25 @@
+**Problem**: [describe the problem you try to solve with this PR.]
+
+**Solution**: [describe carefully what you change by this PR.]
+
+**Changes introduced by this pull request**:
+
+- [...]
+- [...]
+- [...]
+
+**Drawbacks**: [if any, describe the drawbacks of this pull request.]
+
+**TODOs**: [what is not done yet.]
+
+**Fixes**: [what issues this fixes.]
+
+**State**: [the state of this PR, e.g. WIP, ready, etc.]
+
+**Blocking/related**: [issues or PRs blocking or being related to this issue.]
+
+**Other**: [optional: for other relevant information that should be known or cannot be described in the other fields.]
+
+------
+
+_The above template is not necessary for smaller PRs._