feat(git-tools): add pull request edit wrapper (#1080)

packages/mosaic/framework/tools/git/test-help-exit-code.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # Regression harness for #701: -h/--help must exit 0, bad args must still exit nonzero.
 #
-# Covers the 7 wrappers whose usage() previously hard-coded `exit 1`, so every
+# Covers wrappers whose usage() previously hard-coded `exit 1`, so every
 # --help invocation exited nonzero and logged a phantom isError across fleet lanes.
 # Asserts, per wrapper:
 #   1. `--help` exits 0 and prints usage.
@@ -18,6 +18,7 @@ WRAPPERS=(
     issue-list.sh
     milestone-create.sh
     pr-create.sh
+    pr-edit.sh
     pr-list.sh
     pr-merge.sh
 )
@@ -47,7 +48,7 @@ for wrapper in "${WRAPPERS[@]}"; do
 done
 
 if [[ "$fail" -eq 0 ]]; then
-    echo "help-exit-code regression passed (7/7 wrappers)"
+    echo "help-exit-code regression passed (8/8 wrappers)"
 fi
 
 exit "$fail"