refactor: restructure tool target configs into tool package system

- Move tool configs from config/pkg/target/ to config/pkg/tool/
- Add ToolVersionRegistry for tracking installed tool versions
- Delete old Target/pkgconfig.php, move to tool config
- Rename: 7za-win, go-win, go-xcaddy, jom, nasm, protoc, strawberry-perl, upx, vswhere, zig, pkg-config

config/pkg/tool/go-win.yml

@@ -0,0 +1,15 @@
+go-win:
+  type: tool
+  artifact:
+    binary: custom
+  env:
+    GOROOT: '{pkg_root_path}/go-win'
+    GOBIN: '{pkg_root_path}/go-win/bin'
+    GOPATH: '{pkg_root_path}/go-win/go'
+  path@windows:
+    - '{pkg_root_path}/go-win/bin'
+  tool:
+    provides:
+      - go.exe
+      - gofmt.exe
+    binary-subdir: go-win/bin