v1.91.89.0 fix(windows,setup): Git Bash hook false-positive recovery, incoming-checker auto-update, setup never deletes its own checkout (Wave 9 Lane A0) (#3140)

Git Bash hands native Bun C:/ paths while gstack-hook-check looked them up as
/c/, so every TypeScript hook was refused and team-mode auto-update held every
release since 1.91.31. The checker maps Bun's paths back to the shell spelling,
the auto-updater lets the incoming release's own checker decide (installed
checker only as a fallback, hook-check-unavailable when neither verifies), and
docs/troubleshooting.md gives stuck installs one recovery command.
/gstack-upgrade and /spec guards use the --show-prefix root check, gstack-wtree
treats drive-letter --git-path answers as absolute, and setup refuses to
replace a runtime root that is or contains its own checkout, Kiro's in-place
root included (#3084), with --status suggesting the move. New sourced helper
bin/gstack-path-spelling.sh and TS twin lib/path-spelling.ts.

Co-authored-by: yuriysan <63948747+yuriysan@users.noreply.github.com>
Co-authored-by: y$un_ <3579304+szsunyuan@users.noreply.github.com>
Co-authored-by: Frederik Reventlow <267160539+dmfrede@users.noreply.github.com>
Co-authored-by: skleinbe-ny <226563731+skleinbe-ny@users.noreply.github.com>
Co-authored-by: bkermen <184220642+bkermen@users.noreply.github.com>
Co-authored-by: Drew Jankowski <3200063+andrewkjankowski@users.noreply.github.com>

scripts/lib/windows-curation.ts

@@ -275,6 +275,9 @@ export const KNOWN_WINDOWS_SAFE: Array<{ file: string; reason: string }> = [
   { file: 'test/cso-windows-docker.test.ts', reason: '/cso docker.exe discovery under known-folder roots (real path, no reparse points) and the native-transport-unsupported outcome; pure win32 path logic' },
   { file: 'test/copilot-windows-bash.test.ts', reason: 'the Copilot glossary line that runs bash blocks in Git for Windows Bash; reads host config only' },
   { file: 'test/ship-hook-windows-paths.test.ts', reason: 'runs bin/ helpers through explicit bash and Bun argv with forward-slash paths; never executes a shebang; the path-spelling simulation is skipIf win32' },
+  { file: 'test/gstack-wtree-windows-paths.test.ts', reason: '#3101: runs bin/gstack-wtree through explicit bash in an os.tmpdir linked worktree with forward-slash paths; never executes a shebang; the drive-letter simulation is skipIf win32' },
+  { file: 'test/setup-hook-syntax-gate.test.ts', reason: '#3088/#3100: runs bin/gstack-hook-check and the setup hook sections through explicit bash with forward-slash paths; never executes a shebang. Its Bun drive-path spelling is the Windows bug it guards' },
+  { file: 'test/path-spelling.test.ts', reason: 'sources bin/gstack-path-spelling.sh through explicit bash and checks lib/path-spelling.ts; on Windows it exercises the real Git Bash spellings' },
   { file: 'test/state-root-parity.test.ts', reason: 'runs the bash twin and lib/state-root.ts over an env table with PATH empty; no shebang execution, raw-string comparison is platform-neutral' },
   { file: 'test/generator-eexist.test.ts',
     reason: 'E4: runs the generators through Bun argv with the Windows EEXIST emulation preload; no shebang execution' },