chore: Refactor to use standardized naming and color scheme in project.

[apage224]

No description provided.

[Copilot]

Pull request overview

This pull request refactors the project to use standardized naming conventions (changing "HeartKit" to "heartKIT") and updates the color scheme from blue to red in the documentation theme.

Changes:

• Rebranded product name from "HeartKit" to "heartKIT" across all documentation, code comments, and user-facing strings
• Updated MkDocs theme primary color from blue to red
• Updated Python version from 3.11 to 3.12 in CI workflows and notebook metadata
• Bumped package version from 1.6.0 to 1.7.0

Reviewed changes

Copilot reviewed 79 out of 88 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
uv.lock	Version bump from 1.6.0 to 1.7.0
mkdocs.yml	Site name and description updated to "heartKIT", primary color changed from blue to red
Multiple .ipynb files	Product name changed to "heartKIT", kernel display name changed to "heartkit", Python version updated to 3.13.9
Multiple .py files	Updated docstrings and demo titles from "HeartKit" to "heartKIT"
Multiple .md files	Documentation updated with "heartKIT" naming and removed HTML span wrappers from headings
docs/css/custom.css	Added red color (#F52543) for h2 headings
docs/assets/*	New logo files added for light/dark themes
.github/workflows/*.yaml	Updated Python version to 3.12, workflow name changed to "heartKIT CI"
AGENTS.md	New file with repository maintenance notes

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