docs: clean up CLAUDE.md and update repository URLs

[kyamagu]

Summary

• Remove redundant content from CLAUDE.md: generic Claude Code guidance already enforced by the system prompt (File Operations tool list, "read before modifying", "avoid over-engineering"), self-referential text, and doc links duplicated in the Important Links section
• Update all github.com/kyamagu/psd2svg URLs to github.com/CyberAgent/psd2svg across 12 files (docs, templates, pyproject.toml)

Test plan

• Verify links in updated files resolve correctly under the CyberAgent org
• Confirm no kyamagu/psd2svg references remain (grep -r kyamagu .)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR updates repository references to the new CyberAgent/psd2svg GitHub location and streamlines CLAUDE.md by removing redundant Claude-specific guidance already covered elsewhere.

Changes:

• Replaced github.com/kyamagu/psd2svg links with github.com/CyberAgent/psd2svg across project metadata, docs, and GitHub templates.
• Simplified CLAUDE.md by removing redundant sections and self-referential/duplicated content.
• Updated security- and contribution-related pointers (SECURITY policy, issue templates, PR template) to the new org URLs.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pyproject.toml	Updates Homepage/Repository URLs under [project.urls] to the CyberAgent org.
docs/security.rst	Updates advisory/release/security policy links to CyberAgent/psd2svg.
docs/limitations.rst	Updates “Report issues” URL to the new GitHub Issues location.
docs/development.rst	Updates git clone and “Getting Help” links to point at CyberAgent/psd2svg.
SECURITY.md	Updates Security Advisory / Security tab / Issues tab links to the new repo.
CONTRIBUTING.md	Updates Issues and clone URLs to the CyberAgent org.
CODE_OF_CONDUCT.md	Updates the Security Advisory link used for enforcement reporting.
CLAUDE.md	Removes redundant/duplicative guidance and trims sections as described in the PR summary.
CHANGELOG.md	Updates historical compare/tag links to the new GitHub org/repo path.
.github/PULL_REQUEST_TEMPLATE.md	Updates CONTRIBUTING link to CyberAgent/psd2svg.
.github/ISSUE_TEMPLATE/feature_request.yml	Updates Issues link to CyberAgent/psd2svg/issues.
.github/ISSUE_TEMPLATE/config.yml	Updates Security Vulnerability contact link to the new advisory URL.
.github/ISSUE_TEMPLATE/bug_report.yml	Updates Issues + SECURITY.md links to the new repo location.

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