feat(transaction-pay): add ordered strategy fallback orchestration

[pedronfigueiredo]

Explanation

As per preemptive validation on #7806

• Adds ordered strategy retrieval via TransactionPayController:getStrategies while preserving existing getStrategy behavior.
• Adds compatibility filtering (supports(...)) during strategy selection.
• Implements quote fallback orchestration:
  • try next strategy when quote retrieval fails
  • try next strategy when quote list is empty
  • skip unsupported strategies
• Implements publish-hook fallback orchestration:
  • execute primary strategy from existing quote strategy
  • on execution failure, rebuild quote requests and try next compatible strategy
  • throw original primary error if all fallback attempts fail

References

Addresses https://github.com/MetaMask/MetaMask-planning/issues/6992

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Changes the core quote-selection and publish-time execution flow, so subtle ordering/compatibility or fallback edge cases could alter which strategy executes and affect transaction funding behavior.

Overview
Adds ordered strategy orchestration to transaction-pay-controller by introducing TransactionPayController:getStrategies (and a getStrategies constructor callback) while keeping getStrategy working as “first strategy or Relay”.

Quote retrieval now iterates the ordered strategies with optional supports(...) checks and falls back on errors or empty quotes; the publish hook similarly executes the quote’s encoded primary strategy first and, on failure, rebuilds quote requests and retries the next compatible strategies before rethrowing the original error. Documentation and tests are updated to cover the new fallback behavior and the new supports capability on PayStrategy.

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