Add validator command option after updating files

[devin-ai-integration]

Add validator command option after updating files

This PR implements the feature requested in #4 to allow specifying a validator command that will be run after updating files. The validator command is run with the path to the edited file as its first argument.

Features

• Added --validator command-line option to specify the validator command
• Validator command runs after file updates in edit, insert, and delete operations
• Validator results are included in the response

Testing

• Added unit tests to verify validator functionality
• Manually tested with sample validator commands

Fixes #4

Link to Devin run: https://app.devin.ai/sessions/53ff2f6cc5e64fd4a5d79c024d44cb26
Requested by: tumf ([email protected])

[devin-ai-integration]

Original prompt from tumf:

resolve https://github.com/tumf/mcp-text-editor/issues/4

[devin-ai-integration]

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[devin-ai-integration]

Closing due to inactivity for more than 7 days.