refactor: rename to GIM

[Ki-Seki]

Fixes #6

[Copilot]

Pull Request Overview

This PR renames the project from "simfill" (Structured Infilling Modeling) to "gimkit" (Guided Infilling Modeling), addressing issue #6. The refactoring involves updating package names, descriptions, and imports throughout the codebase.

• Package name changed from "simfill" to "gimkit" in pyproject.toml
• All import statements updated to use the new "gimkit" package name
• Project description updated from "Structured Infilling Modeling" to "Guided Infilling Modeling"

Reviewed Changes

Copilot reviewed 17 out of 19 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/simfill/init.py	Empty file removed as part of package rename
src/gimkit/init.py	New package initialization file with exports
src/gimkit/mask_schema.py	Updated module docstring to reference GIM instead of structured infilling model
pyproject.toml	Updated package name, version, and description
exp/09101-GIM-1st/train.py	Updated model save path to use "GIM" instead of "SIM"
dataset/*.py	Updated all import statements from simfill to gimkit
README.md	Updated title to reflect new project name

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