Add formatters, hooks, memory entries and context-load improvements

- formatters/js, md, yaml: new/updated formatter scripts
- hooks/set-wezterm-profile.sh: new hook for WezTerm profile switching
- scripts/context-load: improvements from recent sessions
- HOOKS.md, MEMORY.md: updated documentation and index entries
- memory/log, memory/reference-infrastructure-docs.md: session logs and reference

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

formatters/yaml

@@ -1 +0,0 @@
-json

formatters/yaml

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+# Formatter: JSON/YAML/Markdown — prettier
+# Contract: $1 = absolute file path, format in place, lint, exit 0 if clean / 1 if errors
+# Missing tools: exit 0 silently
+
+FILE="$1"
+[ -z "$FILE" ] && exit 0
+[ -f "$FILE" ] || exit 0
+
+command -v prettier >/dev/null 2>&1 || exit 0
+
+# Format in place (prettier auto-detects parser from extension)
+ERRORS=$(prettier --write "$FILE" 2>&1)
+if [ $? -ne 0 ]; then
+    echo "$ERRORS" >&2
+    exit 1
+fi
+
+exit 0