feat(cli): notify when a flag is wrong and suggest a fix MCP-121

[kmruiz]

Proposed changes

Checklist

• I have signed the MongoDB CLA

[himanshusinghs]

Look good 💯 Left a suggestion for the type.

[Copilot]

Pull Request Overview

This PR enhances the CLI argument validation by adding functionality to detect invalid command line flags and suggest correct alternatives when users make typos. The implementation uses Levenshtein distance to find the closest valid flag names and provides helpful error messages.

• Adds new validation function validateConfigKey that checks for valid CLI arguments and suggests corrections
• Enhances the existing deprecated argument warning system to also handle unknown/invalid arguments
• Integrates the fast-levenshtein library for fuzzy string matching to suggest corrections

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

File	Description
src/common/config.ts	Implements CLI argument validation with typo detection and suggestion logic using Levenshtein distance
tests/unit/common/config.test.ts	Updates test suite to cover new invalid argument detection and suggestion functionality
package.json	Adds fast-levenshtein dependency and its TypeScript types for string similarity calculations

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[coveralls]

Pull Request Test Coverage Report for Build 17487477238

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 59 of 59 (100.0%) changed or added relevant lines in 1 file are covered.
• 13 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.2%) to 81.348%

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Files with Coverage Reduction	New Missed Lines	%
src/transports/base.ts	3	96.77%
src/telemetry/telemetry.ts	10	89.47%

Totals
Change from base Build 17464149391:	0.2%
Covered Lines:	4724
Relevant Lines:	5718

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💛 - Coveralls