docs(reference): import Dune: Awakening server-manager references

Phase 2 references for the host-agent Dune adapter, moved out of volatile /tmp
into docs/reference-repos/ (per Commander). Three upstream projects, .git +
node_modules + compiled binaries stripped (16MB source). Nested AI-instruction
files (.claude/, CLAUDE.md) removed so they don't pollute Corrosion sessions.

- icehunter/    dune-admin (Go+React) — 4 control planes; SETUP_DOCKER.md is the
                closest analog to our agent's Dune docker control plane (compose
                lifecycle, docker logs, RabbitMQ-via-exec, dune Postgres schema)
- adainrivers/  Rust/Tauri desktop — SSH+k8s BattleGroup control, maintenance
                daemon, in-game admin console (Rust idiom reference)
- the4rchangel/ Node web UI replacing battlegroup.bat — matches the Commander's
                Hyper-V self-host path + game-config schema

See docs/reference-repos/README.md for the full index + how we use each.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/reference-repos/icehunter/.gitattributes

@@ -0,0 +1,15 @@
+# Force LF line endings for files where line endings matter at runtime or for
+# tooling correctness. Without this, contributors who clone on Windows with
+# the default `core.autocrlf=true` get CRLF in the working tree, which makes
+# `gofmt -l .` (and therefore `make fmt-check` / the pre-commit hook) report
+# every Go file as unformatted on first checkout.
+
+*.go        text eol=lf
+*.sh        text eol=lf
+*.bash      text eol=lf
+Makefile    text eol=lf
+.githooks/* text eol=lf
+
+# Treat lockfiles as binary so diffs don't churn on encoding changes.
+go.sum             -text
+web/pnpm-lock.yaml -text