docs(functions): standardize all function doc blocks to UNIX man-page style

Replace all ad-hoc inline comments between license headers and function
declarations with consistent SYNOPSIS / DESCRIPTION / ARGUMENTS / RETURNS /
EXAMPLE blocks across all 99 project-owned functions/ files. No executable
logic, variable names, or exit codes were modified.

Completes Task #6 from AGENTS.md (Retroactive Function Documentation
Standardization).

functions/rawfish.fish

@@ -1,7 +1,18 @@
 # Copyright (C) 2026 Rootiest
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-# alias rawfish=env NO_TMUX=1 fish
+# SYNOPSIS
+#   rawfish [args...]
+#
+# DESCRIPTION
+#   Launches a Fish shell with NO_TMUX=1 set, bypassing any tmux
+#   auto-attach or session management hooks.
+#
+# ARGUMENTS
+#   args...  Arguments forwarded to fish
+#
+# EXAMPLE
+#   rawfish
 function rawfish --wraps='env NO_TMUX=1 fish' --description 'alias rawfish=env NO_TMUX=1 fish'
   env NO_TMUX=1 fish $argv