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/claude.fish

@@ -1,6 +1,18 @@
 # Copyright (C) 2026 Rootiest
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
+# SYNOPSIS
+#   claude [args...]
+#
+# DESCRIPTION
+#   Wrapper for the claude CLI that always injects --remote-control unless it
+#   is already present in the argument list.
+#
+# ARGUMENTS
+#   args...  Arguments passed through to the claude command
+#
+# EXAMPLE
+#   claude "Refactor the auth module"
 function claude --wraps='claude --remote-control' --description 'claude with --remote-control always enabled'
     if contains -- --remote-control $argv
         command claude $argv