docs(man): backfill man pages with wiki-only info (source-of-truth pass)

Port information that previously lived only in the GitHub wiki into the
authoritative scdoc man pages, so the man pages become the single source
of truth for module documentation.

33 man pages enriched (options, format replacements, actions, style
selectors, troubleshooting and implementation notes). Additions were
verified against the source; stale/incorrect wiki entries were
deliberately not ported. All pages still compile with scdoc.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

man/waybar-wlr-taskbar.5.scd

@@ -135,6 +135,11 @@ Addressed by *wlr/taskbar*
 
 *{short_state}*: The state (minimize == m, maximized == M, active == A, fullscreen == F) represented as one character of the application.
 
+As with all format replacements in Waybar, a length limit such as *{title:.15}* is
+measured in bytes, not characters. This may produce invalid text if a multi-byte
+character is split, or (when *markup* is true) if the truncation cuts through a
+value that must be escaped in XML.
+
 # CLICK ACTIONS
 
 *activate*: Bring the application into foreground.
@@ -157,6 +162,8 @@ captures of the expression.
 
 Regular expression and replacement follow ECMA-script rules.
 
+An expression must match the format output *fully* to trigger its replacement.
+
 If no expression matches, the format output is left unchanged.
 
 Invalid expressions (e.g., mismatched parentheses) are skipped.