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-docs.fish

@@ -1,7 +1,16 @@
 # Copyright (C) 2026 Rootiest
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-# Update README.md with recent changes using Claude-code
+# SYNOPSIS
+#   claude-docs
+#
+# DESCRIPTION
+#   Invokes Claude Code to analyze recent repository changes and update
+#   README.md, ensuring all features and examples are accurate and pruning
+#   obsolete content.
+#
+# EXAMPLE
+#   claude-docs
 function claude-docs --description 'Claude-code: Sync README with recent changes'
     claude "Analyze the recent changes and update the README.md to ensure all features, setup instructions, and examples are 100% accurate. Prune any obsolete information."
 end