Separate plugin source code base

[olemis]

Is your feature request related to a problem? Please describe.
Evolution of wallet code requires QT 6 C++ , but plugins shall remain written in golang for better memory management.

Describe the solution you'd like
Wallet code will be separated from plugin API code and will remain in https://github.com/fibercrypto/fibercryptowallet repository will be moved onto https://github.com/fibercrypto/fibercrypto . These shall be the initial steps.

• Rewrite repository commit messages so that issue references point at issues in https://github.com/fibercrypto/fibercryptowallet
• Prune wallet code
• Rewrite README file
• Ensure libfibercrypto remains functional after the migration
• Clear CHANGELOG
  • Add link to fibercrypto/fibercryptowallet's CHANGELOG know previous history.
• Redact Makefile

Describe alternatives you've considered
Reimplementing plugin API is not an option . Thee's too much effort involved and C++ does not seem a language that can make things easier for plugin development long term .

Additional context
Use newren/git-filter-repo for rewriting git history.