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/dops.fish

@@ -1,7 +1,20 @@
 # Copyright (C) 2026 Rootiest
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-# Execute docker
+# SYNOPSIS
+#   docker [subcommand] [args...]
+#
+# DESCRIPTION
+#   Wrapper for docker that intercepts the ps subcommand and redirects it to
+#   the dops function for enhanced container listing. All other subcommands are
+#   passed through to the real docker binary.
+#
+# ARGUMENTS
+#   subcommand  Docker subcommand (ps is redirected to dops)
+#   args...     Arguments forwarded to docker or dops
+#
+# EXAMPLE
+#   docker ps
 function docker --description 'Execute docker'
     if test -n "$argv[1]"
         switch $argv[1]