feat: add Step Flow Dialog component and documentation for multi-step workflows

[vvm1004]

This pull request introduces a new set of reusable transaction workflow components and preview/demo pages to showcase transaction progress and step flows. The changes are primarily focused on enhancing the UI for transaction feedback, including step-by-step dialogs and progress indicators, and making these components available for use throughout the codebase.

New Transaction Workflow Components

• Added TxnProgressSteps component for visually displaying transaction steps with support for horizontal and vertical orientations, and various step states (completed, active, pending, error). (components/ui/murphy/Txn-Feedback/txn-progress-steps.tsx)
• Added StepFlowDialog component to present a modal dialog guiding users through multi-step transaction workflows, with navigation controls and progress feedback. (components/ui/murphy/Txn-Feedback/step-flow-dialog.tsx)

Preview/Demo Pages

• Created TxnProgressStepsPreview page to demonstrate the transaction progress steps component with different layouts and step states, including simulation of progress and error flows. (components/txn-progress-steps-preview.tsx)
• Created StepFlowDialogPreview page to showcase the step-by-step dialog for various transaction workflows (NFT minting, token swap, staking), including step navigation and status updates. (components/step-flow-dialog-preview.tsx)

Exports and Integration

• Exported TxnProgressSteps and StepFlowDialog from the Murphy UI index for easy reuse in other parts of the application. (components/ui/murphy/index.tsx) [1] [2]

Minor Code Cleanup

• Fixed a missing semicolon in the import statement for CompressedNFTViewer in the Murphy UI index. (components/ui/murphy/index.tsx)