Parallel maintenance topics

• mdformat pre-commit hook is hanging (#505 - closed)
• rich-click v1.9.0 breaks some tests (#506 - closed)
• DeathReaper: Move forum and currency choice han... (#509 - closed)
• Update copyright to 2026 (#496 - closed)
• Use Material for Mkdocs insiders features (#511 - closed)
• Add Python v3.14 and drop Python v3.9 support (#489)

Initial porting to Duniter v2 Polkadot-SDK/Squid

#429: Duniter v2 Substrate support with polkadot-sdk: RPC calls, Indexer

• Get rid of non needed features
• Set up Duniter-v2s and Indexer on ĞDev
• Set up two network layers: RPC, Indexer
• Tools, functions, helpers:
  • Amounts management: cent, unit, and relative fo... (#193)
  • UDValue
  • Implement mnemonic authentication import
• Port some commands to v2 ecosystem
  • wot lookup
  • wot status
  • wot certify
  • money history
  • money balance

Close porting project: postponed to %0.21.0:

• network-check: #370