Unify installer colors with vim/shell palette and clean up output

- Replace BLUE/CYAN/CYAN_BOLD with TEAL/TEAL_BOLD (#2CB494) to match
  the primary accent used across vim, zsh prompt, tmux, and fzf
- Update BLUE (#0C48CC -> #4068D4) then merge into TEAL
- Update RED (#F40404 -> #F88C14) to match vim/shell error orange
- Rename GREEN to grey-blue (#7290B8) for [PASS] messages
- Format all raw echo output with log functions or log_quote
- Suppress sudo prompt when credentials are already cached
- Add missing log_pass to 22-zsh.sh and 23-stow.sh
- Convert raw 'already installed' echos to log_skip (7 scripts)
- Pipe SSH key and mise output through log_quote
- Suppress noisy bat cache and mise WARN output
- Match fastfetch colors to palette (teal logo, grey-blue keys)

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

install.d/30-mise.sh

@@ -36,7 +36,7 @@ if ! command -v mise &>/dev/null; then
     esac
 fi
 
-echo "mise $(mise --version)" | log_quote
+echo "mise $(MISE_QUIET=1 mise --version)" | log_quote
 
 # Skip runtimes in Codespaces (use pre-installed versions)
 if [[ "$DOTS_ENV" != "codespaces" ]]; then
@@ -46,9 +46,9 @@ if [[ "$DOTS_ENV" != "codespaces" ]]; then
     )
 
     log_info "Installing runtimes..."
-    mise install "${MISE_RUNTIMES[@]}"
+    MISE_QUIET=1 mise install "${MISE_RUNTIMES[@]}" 2>&1 | log_quote
     for tool in "${MISE_RUNTIMES[@]}"; do
-        mise use -g "$tool"
+        MISE_QUIET=1 mise use -g "$tool" 2>&1 | log_quote
     done
 fi
 
@@ -76,11 +76,11 @@ fi
 
 log_info "Installing apps..."
 for tool in "${MISE_APPS[@]}"; do
-    mise use -g "$tool"
+    MISE_QUIET=1 mise use -g "$tool" 2>&1 | log_quote
 done
 
 # Rebuild bat theme cache with mise-installed bat (must match delta's syntect version)
-bat cache --build 2>/dev/null
+bat cache --build &>/dev/null
 
 if [[ "$DOTS_ENV" != "codespaces" ]]; then
     # Setup Poetry ZSH completions (XDG compliant)