chore: track Vitis workspace .metadata project list

Root .gitignore: remove *.metadata/ global pattern that was
preventing Vitis workspace metadata from being tracked.
Vitis .gitignore: replace blanket .metadata/ ignore with
granular rules — track project references (.projects/,
.safetable/, version.ini) while excluding machine-specific
snapshots, logs, locks, and plugin caches.

Fixes empty workspace after cloning on another machine.

.gitignore

@@ -115,7 +115,8 @@ work/
 *.gen/
 *.tmp/
 *.data/
-*.metadata/
+# *.metadata/ 已移除 — Vitis 工作区需要追踪 .metadata 中的项目列表
+# Vitis workspace 的 .metadata/ 由 2.FW/Zynq/proj_cal/Vitis/.gitignore 精细管理
 
 # Vivado 独立目录
 .Xil/