Write essential documents for setting up, building, and executing

[dongsam]

Bullet Points

• add docs/Tutorials
  • init testnet with genesis setting for proposing budget(short voting period) and account balance for budget source accounts and collected budget accounts
  • Add some tax using ChangeParameterProposal
  • checking balance of a account of collected budget
• update README.md
• update TECHNICAL-SETUP.md

References

• https://github.com/allinbits/cosmos-cash/blob/main/docs/Explanation/ADR/adr-002-docs-structure.md

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[jaybxyz]

I'm on it now 🚀