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/74-vscode.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+# -----------------------------------------------------------------------------
+# Description:
+#   (macOS only) Install Visual Studio Code.
+#
+
+# macOS only
+[[ "$DOTS_OS" != "macos" ]] && { log_skip "Not macOS"; return 0; }
+
+if ! echo "$BREW_CASKS" | grep -q "^visual-studio-code$"; then
+    brew install --cask visual-studio-code
+fi
+log_pass "VSCode installed"
+echo "$BREW_CASK_VERSIONS" | grep "^visual-studio-code " | log_quote