fix(scripts): put the shebang on line 1 of panll-launcher.sh

The shebang was not the first line, so the kernel never honoured it — the
script ran under whatever shell invoked it rather than the one it declares.
shellcheck reports this as SC1128.

Found by an estate-wide sweep of 5,111 tracked scripts across 375 repos: 20
files carry this defect, 19 of them a generated *-launcher.sh.

⚠ Source not identified. The generator,
standards/docs/UX-standards/comprehensive-launcher-template.sh, is CLEAN — its
own line 1 is the shebang and it reports 0 shellcheck errors. The stray line is
therefore introduced when the launcher is copied into each repo, by something
not yet found, so this may recur until that is tracked down.

Other lines are preserved in order; only the shebang moves.

Author: hyperpolymath

panll-launcher.sh

@@ -1,4 +1,3 @@
-
 #!/usr/bin/env bash
 # SPDX-License-Identifier: MPL-2.0
 # Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>