cub: full AUR package manager + Phase 1-5 native build tools

cub redesign (local/recipes/system/cub/):
- AUR RPC v5 client (serde_json) with search/info
- ~/.cub/ user-local recipe/source/repo storage
- Enhanced PKGBUILD parser: optdepends, .SRCINFO, split packages, 19 linuxism patterns
- Recipe generation: host: prefix on dev-deps, shallow_clone, cargopath, installs, optional-packages
- Dependency resolver: scans build errors for missing commands/headers/libs/pkgconfig, maps to packages
- Dependency installation: checks installed packages, fetches AUR deps, interactive prompt
- ~110 Arc→Redox dependency mappings
- ratatui TUI: search, info, install, build, query views
- 14 Arch-style CLI switches (-S/-Si/-Syu/-G/-R/-Q/-Qi/-Ql)
- 65 tests, 0 failures, clean build

Phase 1-5 native build tools (local/recipes/dev/):
- P1 Substrate: tar, m4, diffutils (gnulib bypass), mkfifo kernel patch (1085 lines)
- P2 Build Systems: bison, flex, meson (standalone wrapper), ninja-build, libtool
- P3 Native GCC: gcc-native, binutils-native (cross-compiled for redox host)
- P4 Native LLVM: llvm-native (clang + lld from monorepo)
- P5 Native Rust: rust-native (rustc + cargo)
- Groups: build-essential-native, dev-essential expanded

Config:
- redbear-mini: +7 tools (diffutils, tar, bison, flex, meson, ninja, m4)
- redbear-full: +4 native tools (gcc, binutils, llvm, rust)
- All recipes moved to local/ with symlinks for cookbook discovery (Red Bear policy)

Docs:
- BUILD-TOOLS-PORTING-PLAN.md: phased porting roadmap
- CUB-WORKFLOW-ASSESSMENT.md: gap analysis and integration assessment

local/recipes/dev/gnu-make/redox.patch

@@ -0,0 +1,40 @@
+diff -ruwN make-4.4/src/arscan.c source/src/arscan.c
+--- make-4.4/src/arscan.c	2022-10-23 16:52:32.000000000 +0200
++++ source/src/arscan.c	2024-08-23 18:28:49.206084084 +0200
+@@ -331,7 +331,7 @@
+ #endif
+ 
+ #ifndef WINDOWS32
+-# if !defined (__ANDROID__) && !defined (__BEOS__)
++# if 0
+ #  include <ar.h>
+ # else
+    /* These platforms don't have <ar.h> but have archives in the same format
+diff -ruwN make-4.4/src/getopt1.c source/src/getopt1.c
+--- make-4.4/src/getopt1.c	2022-10-23 21:52:32.000000000 +0700
++++ source/src/getopt1.c	2026-01-24 23:28:34.306706884 +0700
+@@ -48,6 +48,10 @@
+ #endif
+ #endif
+ 
++#ifdef __redox__
++#define ELIDE_CODE
++#endif
++
+ #ifndef ELIDE_CODE
+ 
+ 
+diff -ruwN make-4.4/src/getopt.c source/src/getopt.c
+--- make-4.4/src/getopt.c	2022-10-23 21:52:32.000000000 +0700
++++ source/src/getopt.c	2026-01-24 23:21:09.488487860 +0700
+@@ -56,6 +56,10 @@
+ # endif
+ #endif
+ 
++#ifdef __redox__
++#define ELIDE_CODE
++#endif
++
+ #ifndef ELIDE_CODE
+ 
+