docs(functions): merge remaining manual prose into function headers

Folds the last seven manual entries whose description exceeded their header
back into the source-of-truth comment blocks: config-settings (Sponge/Paths
page detail, list-value parsing, width tiers, navigation keys), fish-deps
(install-method priority, dependency tiers), logs (fzf keybindings, ov
viewer behavior), kitty-logging (symlink wording, C5 inert-vs-uninstalled),
config-update (exec fish reload), yt-dlp (C1 guard). Drops duplicate example
lines left by the previous merge.

functions/edit.fish

@@ -41,8 +41,6 @@
 #   edit --terminal --new todo.md
 #   edit --editor=code --clipboard
 #   edit --text="hello world"
-#   edit ~/.config/fish/config.fish
-#   edit --visual notes.txt
 function edit --description 'Open files in a terminal or GUI editor with fallbacks'
     set -l c_head (set_color --bold cyan)
     set -l c_cmd (set_color --bold white)