Shrared state ubus

[javierbrk]

This pull request provides access to shared-state infrastructure for the UI.
It is intended to be used to retrieve actual state and record global network state into shared state infrastructure.

The upgrade provides three methods witch can be used to get information from existing shared state modules like "wifi_links_info".

get the list of available methods using

ubus -v list shared-state

then use them like in the example below

ubus -S call shared-state getFromSharedState '{"data_type": "wifi_links_info" }'

It can also be used to record and retrieve information across the whole network

ubus -S call shared-state insertIntoSharedStateMultiWriter '{"data_type": "ref_state_wifi_links", "json": {"primero":{"bleachTTL":27}}}'
ubus -S call shared-state getFromSharedStateMultiWriter '{"data_type": "ref_state_wifi_links"}'

to get the info in another node the others need to sync on the same topic

shared-state-multiwriter sync ref_state_wifi_links
ubus -S call shared-state getFromSharedStateMultiWriter '{"data_type": "ref_state_wifi_links" }'

in conclusion the ui cant create new data types. We need to add them first as a module in every node.

[codecov-commenter]

Codecov Report

Merging #1040 (255d004) into master (bf158a1) will increase coverage by 0.45%.
Report is 33 commits behind head on master.
The diff coverage is 100.00%.

❗ Current head 255d004 differs from pull request most recent head 9cc5abf. Consider uploading reports for the commit 9cc5abf to get more accurate results

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@@            Coverage Diff             @@
##           master    #1040      +/-   ##
==========================================
+ Coverage   79.27%   79.72%   +0.45%     
==========================================
  Files          53       53              
  Lines        4444     4523      +79     
==========================================
+ Hits         3523     3606      +83     
+ Misses        921      917       -4     

Files Changed	Coverage Δ
...ges/lime-system/files/usr/lib/lua/lime/network.lua	78.39% <100.00%> (+0.20%)	⬆️
tests/fakes/iwinfo.lua	98.13% <100.00%> (+1.02%)	⬆️

... and 2 files with indirect coverage changes

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[javierajorge]

Output data should not include shared state info, I'll remove extra information

[G10h4ck]

See inline comments

[G10h4ck]

sed -i s/muti_writer/multi_writer/g ;-)
also better not mixing up underscore (python like) and camel case, either keep _ o camel case but not both ;)