(fix): shortest fails when dotenv is not present

[devin-ai-integration]

Fixes #371 - Adds dotenv to the list of packages installed during initialization to prevent the ERR_MODULE_NOT_FOUND error when running the shortest CLI for the first time after initialization.

Link to Devin run: https://app.devin.ai/sessions/633319e29cf746c2a3f68c1e785f669d
Requested by: louismorgner

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Name	Status	Preview	Comments	Updated (UTC)
shortest	⬜️ Ignored (Inspect)			Mar 3, 2025 5:33pm

[devin-ai-integration]

🤖 Devin AI Engineer

Original prompt from Razvan:

SYSTEM:
The following is the thread conversation in Slack channel #shortest that you've been added to:

=== BEGIN THREAD HISTORY ===
U01URMDMFRP: 

[anti-work/shortest] Issue opened by louismorgner

U01UV2D06H5: @Devin could you investigate <https://github.com/anti-work/shortest/issues/371>


=== END THREAD HISTORY ===

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[rmarescu]

dotenv is used internally by shortest. Why adding it here?

[devin-ai-integration]

While dotenv is used internally by shortest, it's listed as a peerDependency in package.json, which means it's expected to be installed by the user rather than being bundled with the package. However, it wasn't being installed during initialization, causing the error reported in issue #371. Adding it to the installation list ensures that users can run the CLI without encountering the ERR_MODULE_NOT_FOUND error.