[Tech debt] Restructuring Tarantool docs

[NickVolynkin]

Description

This is a flat list of tasks related to restructuring docs. The tasks have been collected since 2021.
A 6-stage restructuring plan has been proposed (internal Notion document).
By October 2022, the two first stages of the plan have been implemented: #3054, #3116

Issues

• Integrate tarantool.io/en/dev/core & internals #2635
• Add the umbrella section Concepts #2987
• Clarify the term "modules" #2757
• Deprecate 1.6 and its doc #2663
• [0pt] Name for Cartridge docs in the TOC #1996
• Sort information about connectors #2667
• https://github.com/tarantool/tarantool.io/issues/1275
• Add supported architecture description #2487
• ☂️ Renew Tarantool Core developer guidelines (aka Contribution Guide) #1655
• Sort modules by purpose in the reference #2731
• Improve the Release Notes section #2734
• Move few pages of contribution guide to public Tarantool's wiki #2748
• Add page with list of documentation links for Tarantool modules #3148

Issues regarding individual topics

• Improve the Transactions section #2812
• Placement of Yields and Cooperative multitasking  #2944
• Make the Getting Started section more intuitive #2805
• [2pt] Add example about working with varbinary fields  #1542 - might require restructuring Indexes
• [13pt] Cartridge: restructure info about app start parameters and instances.yml #1651
• Determine cookbook location #1344
• module api: new region, ibuf, key_def, tuple, Lua/C APIs #1611
• Outdated and duplicate information in memtx section #2996
• [2pt] Describe LuaJIT profiler (aka "jit.p") #1986

Archive and brainstorming

NickVolynkin's idea

Понятное оглавление и навигация
Раздел про основы Тарантула: модель данных, основные понятия
Раздел про коннекторы (драйверы)
Раздел про разработку на Lua
Раздел про кластеризацию
Раздел про администрирование

NeraverinTarantool's idea

https://docs.google.com/document/d/16SQYAXRaL6H6EEnGXozJevXyVRKDk3QLndLfQrLjaho/edit

Discussion

https://www.notion.so/tarantool/TBD-b7eb3a91fdb545f8b1bea6755e73778d#99a734c36c174eb5ba6e50b2568073c9

[andreyaksenov]

Docs are restructured: #3817. Future tasks:

• The Developing applications section is going to be reworked: Update the 'Developing applications' section to using a new approach to develop apps #3920.
• The Administration section: [Epic] Update the 'Administration' section #4154