fix: print helpful guidance when init declines overwrite

[vivekyadav-3]

Summary

Closes #4

When a user ran apidrift init and answered No to overwriting an
existing config, the CLI returned silently — no message, no guidance,
leaving the user confused about what to do next.

Changes

• src/commands/init.js: Replaced silent return with a clear info
  block showing

[Copilot]

Pull request overview

Improves CLI UX by printing clear next steps when apidrift init detects an existing config and the user declines to overwrite it, preventing a confusing “silent exit”. Also makes snapshot listing order stable by sorting snapshot tags.

Changes:

• Print a “next steps” guidance block when overwrite is declined in apidrift init.
• Sort snapshot tags returned by listSnapshots() for stable output ordering.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/commands/init.js	Adds user-facing guidance when declining to overwrite an existing apidrift.config.json.
src/storage/snapshotStore.js	Sorts snapshot tag names for deterministic listing.

Comments suppressed due to low confidence (1)

src/commands/init.js:45

• This “Next steps” block largely duplicates the one printed after creating a new config (later in this file). Consider extracting a small helper to print the shared guidance (with a parameter for the step-1 wording) to avoid the two blocks drifting over time.

      console.log("  Your current config was not modified. Next steps:");
      console.log(
        `  1. Make sure you have a ${chalk.cyan(".env")} file with your tokens:`
      );
      console.log(`     ${chalk.gray("STAGING_TOKEN=your_token_here")}`);
      console.log(`     ${chalk.gray("PROD_TOKEN=your_token_here")}`);
      console.log(
        `  2. Add ${chalk.cyan(".env")} to your ${chalk.cyan(".gitignore")} to keep tokens out of git`
      );
      console.log(
        `  3. Run: ${chalk.cyan("apidrift snapshot --tag v1.0 --env staging")}`
      );
      console.log("");

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[vivekyadav-3]

Hi @tanmayjoddar,
I have submitted this pull request to resolve the corresponding issue. The changes are fully tested, have no merge conflicts, and are ready for review.
Could you please take a look and merge this under GSSoC '26 when you get a chance? Thank you