feat(qor): Add setup TNS to rule generation and tracking

This commit introduces Total Negative Slack (TNS) for setup timing as a new Quality of Result (QoR) metric.

While Worst Negative Slack (WNS) tracks the single most critical path, TNS provides a more comprehensive view of the design's overall timing health by summing the slack of all violating paths.

The rule generation script (`genRuleFile.py`) has been updated to handle the new `finish__timing__setup__tns` metric.

Signed-off-by: Jaehyun Kim <[email protected]>

Author: jhkim-pii

flow/util/genRuleFile.py

@@ -129,6 +129,14 @@ def gen_rule_file(
             "round_value": False,
             "compare": ">=",
         },
+        "finish__timing__setup__tns": {
+            "mode": "padding",
+            "padding": 30,
+            "min_max": min,
+            "min_max_direct": 0,
+            "round_value": False,
+            "compare": ">=",
+        },
         "finish__design__instance__area": {
             "mode": "padding",
             "padding": 15,