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/ld.fish

@@ -1,7 +1,15 @@
 # Copyright (C) 2026 Rootiest
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-# Run lazydocker on the current Docker context
+# SYNOPSIS
+#   ld
+#
+# DESCRIPTION
+#   Launches lazydocker targeting the currently active Docker context by
+#   resolving the host endpoint from docker context inspect.
+#
+# EXAMPLE
+#   ld
 function ld --description 'Run lazydocker on the current Docker context'
     # Fetch the host endpoint of the currently active Docker context
     set -l current_host (docker context inspect --format '{{.Endpoints.docker.Host}}')