Extract small, reusable components from Stellar Plus (transaction configs, plugin hooks, profiler)

[sagpatil]

Motivation: Stellar Plus contains useful small helpers (config reuse, plugin/hook pattern, profiler exporters). Extract maintainable pieces without importing the whole unmaintained project.

Proposed approach:

• Inventory Stellar Plus features and select candidates for extraction (transaction config helpers, plugin/hook API, profiler exporter).
• Extract each candidate into a small, well-tested module with docs and examples.
• Mark larger or unmaintained parts as experimental or out-of-scope.

Acceptance criteria:

• At least two small components are extracted, documented, and tested.
• Each extracted component includes a maintenance note and owner.