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/clonet.fish

@@ -1,7 +1,22 @@
 # Copyright (C) 2026 Rootiest
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-# alias clonet=clone-in-kitty --type=tab
+# SYNOPSIS
+#   clonet [args...]
+#
+# DESCRIPTION
+#   Alias for clone-in-kitty --type=tab that clones a repository into a new
+#   Kitty terminal tab. Only works inside the Kitty terminal.
+#
+# ARGUMENTS
+#   args...  Arguments forwarded to clone-in-kitty (typically a repo URL)
+#
+# RETURNS
+#   0  Repository cloned
+#   1  Not running inside Kitty terminal
+#
+# EXAMPLE
+#   clonet https://github.com/user/repo.git
 function clonet --wraps='clone-in-kitty --type=tab' --description 'alias clonet=clone-in-kitty --type=tab'
     if test "$TERM" != xterm-kitty
         echo "Error: The 'clonet' command requires Kitty terminal." >&2