5 new MCP tools for chip/module discovery, comparison, and procurement
planning using Espressif's public product catalog API. Data is lazily
fetched and cached in-memory with a 24h TTL.
Tools: esp_product_search, esp_product_info, esp_chip_compare,
esp_product_recommend, esp_product_availability
Resource: esp://products/catalog
Smoke tested against real Espressif QEMU fork — esptool successfully
identifies, reads flash_id, and writes firmware to emulated ESP32 via
socket://localhost:5555. Enriched CHIP_MACHINES with per-chip efuse
data, GPIO strap values, and watchdog timer driver names derived from
ESP-IDF's qemu_ext.py.
