chore(install): optimize logging, speed, cleanup

- Version logged after [PASS] (not before) across all scripts
- Pre-cache brew package lists with log_info progress
- Read brew version from git describe cache (skip Ruby startup)
- Batch mise use -g calls (single invocation for all tools)
- Replace mise verify step with mise ls --current
- Parallel vim plugin pulls
- Skip donut compile when binary is fresh
- Pre-check macOS defaults before writing (skip fsync when unchanged)
- Pre-check dock state before dockutil calls
- Remove redundant 'already installed' skip logs
- Remove meetingbar and wispr-flow install scripts
- Renumber scripts to fill gaps

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

install.d/26-preview.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+# -----------------------------------------------------------------------------
+# Description:
+#   Install preview dependencies: chafa (images), poppler (PDFs).
+#
+
+# chafa — terminal image viewer
+if ! command -v chafa &> /dev/null; then
+    case "$DOTS_PKG" in
+        brew)
+            brew install chafa
+            ;;
+        apt)
+            sudo apt-get install -qq chafa
+            ;;
+        pacman)
+            sudo pacman -S --noconfirm --needed chafa
+            ;;
+        *)
+            log_warn "Skipping chafa install: no supported package manager found"
+            ;;
+    esac
+fi
+
+# pdftotext — PDF text extraction (part of poppler)
+if ! command -v pdftotext &> /dev/null; then
+    case "$DOTS_PKG" in
+        brew)
+            brew install poppler
+            ;;
+        apt)
+            sudo apt-get install -qq poppler-utils
+            ;;
+        pacman)
+            sudo pacman -S --noconfirm --needed poppler
+            ;;
+        *)
+            log_warn "Skipping poppler install: no supported package manager found"
+            ;;
+    esac
+fi
+log_pass "preview dependencies"
+command -v chafa &> /dev/null && chafa --version | sed -n '1p' | log_quote
+command -v pdftotext &> /dev/null && pdftotext -v 2>&1 | sed -n '1p' | log_quote