fix: Add miniz directive to get rid of compilation warning (#858)

## Summary

* I am getting miniz warning during compilation: "Using fopen, ftello,
fseeko, stat() etc. path for file I/O - this path may not support large
files."
* Disable the io module from miniz as it is not used and get rid of the
warning

## Additional Context

* the ZipFile.cpp implementation only uses tinfl_decompressor,
tinfl_init(), and tinfl_decompress() (low-level API) and does all ZIP
file parsing manually using SD card file I/O
* it never uses miniz's high-level file functions like
mz_zip_reader_init_file()
* so we can disable Miniz io-stack be setting MINIZ_NO_STDIO to 1

### AI Usage

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helps set the right context for reviewers.

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platformio.ini

@@ -22,6 +22,7 @@ build_flags =
   -DARDUINO_USB_MODE=1
   -DARDUINO_USB_CDC_ON_BOOT=1
   -DMINIZ_NO_ZLIB_COMPATIBLE_NAMES=1
+  -DMINIZ_NO_STDIO=1
   -DEINK_DISPLAY_SINGLE_BUFFER_MODE=1
   -DDISABLE_FS_H_WARNING=1
 # https://libexpat.github.io/doc/api/latest/#XML_GE