Build verified Linux release packages

docs/PROJECT-STRUCTURE.md

@@ -44,6 +44,13 @@ S:\Game Hacking\Eushully\Himegari\           ← workspace root (three siblings)
     │   │                                        tools import it; relocatable with no other edits.
     │   ├── validate.py                        layered core/workspace/runtime/full validation driver
     │   ├── test_validate.py                   pure resolver + validation-plan regressions
+    │   ├── build-linux-x64.sh                 one-command pinned Linux export/package/smoke pipeline
+    │   ├── bootstrap-godot-linux-x64.sh       repo-local Godot 4.7 Linux editor/template bootstrap
+    │   ├── godot-linux-x64.json               immutable Godot editor/template source + SHA-256 manifest
+    │   ├── install_godot_templates.py         selective HTTP-range installer for pinned template members
+    │   ├── package_linux_x64.py               export verifier + notice/checksum/archive packager
+    │   ├── test_install_godot_templates.py, test_package_linux_x64.py
+    │   │                                       source-only bootstrap/package regressions
     │   ├── sys4load.py                         loader + disassembler (opcode-decoding)
     │   ├── age_opcodes.py                      GENERATED complete Python ABI view (do not hand-edit)
     │   ├── opcodes_build.py                    generator/linter: vm-map/opcodes.toml -> the 5 artifacts below
@@ -93,6 +100,10 @@ S:\Game Hacking\Eushully\Himegari\           ← workspace root (three siblings)
     │   └── engine-re.md                        native-engine RE (Ghidra+MCP): dispatch table, decompiled ops
     │
     ├── build/                               DERIVED (our-work-side) — generated by tools/; disposable
+    │   ├── downloads/, toolchains/             immutable dependency caches and repo-local Godot toolchain
+    │   ├── export/linux-x64/                   verified loose Godot Linux export
+    │   ├── native/linux-x64/                   validated FFmpeg shim/shared-library bundle
+    │   ├── package/                            staged release tree, smoke log, and `.tar.gz` artifact
     │   ├── disasm/                            <NAME>.asm — human-readable disassembly, one per script
     │   ├── text/                              extracted text:
     │   │   ├── <NAME>.strings.txt               all inline strings in a script