Support backend for Iroha 2.0.0-rc.1

[VladislavPopovSR]

Sibling of soramitsu/iroha2-block-explorer-backend#43

TODO

Must:

• Transactions & Instructions filters (Feat - Add tx filters #45)
• Refer to blocks via their height everywhere (Feat - Add tx filters #45)
• Shorten AccountId (Feat - Add tx filters #45)
• Add transactions quantity (including rejected) on BlocksList , e.g. "3 (2 rejected)" (Feat - Add tx filters #45)
• Add owned domains section on AccountDetailsPage (Feat - Add tx filters #45)
• On AssetList fetch assets definitions instead (Feat - Add tx filters #45)
• On TransactionsList print authority and the kind of instructions (let's rename it to "Kind of Executable" for clarity) - is it Instructions or WASM (Feat - Add tx filters #45)

Optional, but important:

• Integrate vue-kakuyaku/core. Also add refetching every n seconds;
• Add query params for pages that include table & filters;
• Divide BaseTable component and write unit tests;
• Fix dropdown closing;
• Check i18n texts. Also error texts;
• For all tables, display rows placeholders to avoid UI shifts on filters/page changes while new data is not loaded yet
• For all tables, add "no data" filler.
• Tables: consider adding headers?
• As soon as JS SDK ready correct instructions' payload display; #51
• Research what data should show home page's disclaimer. Maybe fetch something?
• Unified display of JSON values: monospace, formatted, colored, maybe even interactive
• Proper "Age" display:
  • Adjust precision dynamically (e.g. not "1343 mins 35 secs ago", but "22 hours 23 minutes ago")
  • Add a timer to update rendered age according to precision (each N seconds, or minutes, or hours)
  • Add a tooltip to display an actual fixed timestamp instead of the age
• Add localisation for other languages
• Add total nodes display

To be discussed 🕔

• BaseContentBlock closing arrow;
• Ipfs logos display;
• Unified search;
• Download list data. Maybe as csv or excel table;
• Display triggers, peers, data-model of executor, roles and permissions;
• Display blocks chart, total blocks amount and average block speed on BlocksList;
• Add explore section with socials, links to latest iroha articles and so on;
• Add currency selection;

[VladislavPopovSR]

Created separated issues instead