[post merge ] Spiffs continuation/documentation/impact

[cjbrigato]

This issue follow the merge of SPIFFS implementation from #257 and discuss post merge actions and eventual improvement on this topic.

What is needed right now :

• Documentation
• Patch to hf_bog to rely on spiffs and not on overwriting it the old way (see HF_BOG fixes for spiffs #286 )
• Adapt lua script read_pwd_mem.lua to match new hf_bog
• use PM3_SUCCESS and alike when it makes sense
• Migrate MFC/iclass/t55 dictionaries to SPIFFS
• Show some of the mem spiffs info details in hw status, after Flashmem_print_info
• New pass against client side commands, at least regarding Sanity checks
• SPIFFS side, transform all writing (copy, rename, etc) function to avoid the RDV40_SPIFFS_FILETYPE_BOTH, by means of precedence of either RDV40_SPIFFS_FILETYPE_REAL or RDV40_SPIFFS_FILETYPE_SYMLINK being authoritative.

[cjbrigato]

#286 for HF_BOG

[doegox]

FTR now Makefile properly detects incompatible PLATFORM & STANDALONE (e.g. HF_COLIN requiring Flash on a non RDV4). Yes the problem pre-dated SPIFFS...

[iceman1001]

nice list, good one.

[cjbrigato]

spiffs now also permit json reading and parsing on device-side. See #299

[iceman1001]

Dictionaries has been converted to files.
the last sector has been freed up for SPIFFS.
Dynamic identification of SPIFF memory which is larger than the original 256kb on RDV4 has been implemented.