Flash size reduction for mime-type

[s-hadinger]

The current mime-type array is based on Entry structure with fixed size string that waste a lot of Flash space (~600 bytes):

struct Entry
{
  const char endsWith[16]; 
  const char mimeType[32];
};

I replaced with 2 arrays for suffix and mime-type, with PROGMEM strings.

I also added #define MIMETYPE_MINIMAL to reduce the footprint to mime-types that are strictly necessary: html, txt, gz

Overall this saves a little over 1kB for Tasmota.

[d-a-v]

Nice but it's an API breaking change.

[s-hadinger]

Oh, if mimeTable[] is part of the API, I can put it back in a single array which would be API-compatible. Let me do the change.

[s-hadinger]

Closed in favor of #7312