James L 8561e9d5ba Fix esptool discovery: prefer pip-installed over bundled ...

Bundled esptool.py runs via sys.executable, which may be a Python
that lacks pyserial (e.g. miniconda). Reorder find_esptool() to
prefer pip-installed esptool first (handles its own deps), and
only fall back to bundled/PlatformIO scripts if pyserial is
importable. Give a clear error message if neither works.

2026-02-22 21:19:59 -05:00

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