[8pt] [Contribution Guide]: scope analysis, TOC

[veod32]

Part of #1655.

First of all we need to

• Analyse the scope of work reported in ☂️ Renew Tarantool Core developer guidelines (aka Contribution Guide) #1655 + other topics related to Contribution Guide (CG)
• Create TOC and send it for review to the product managers and core team

[veod32]

Questions:

• Who is the TA (target audience) for this guide?

High level draft TOC -- need another round of discussion

1. Introduction (landing page -- revised https://www.tarantool.io/en/doc/latest/contributing/contributing/)

2. Code development

   2.1 Coding

   • General workflow
   • Setup
   • Development process
   • Commiting

   2.2 Code review
   2.3 Tests
   2.4 Build (?)
   2.5 Bug reporting (?) -- can be a subtopic

3. Documentation

4. Feedbacks and suggestions

5. Style guides

   • C style guide
   • Lua style guide
   • Documentation style guide