Pskel v4

[zeriyoshi]

• support PIE
• update license to BSD-3-Clause (follow PHP license changes)
• update stable LLVM-22 toolchain
• fix composer.json generation
• change pskel.sh to symlink
• fix composite function coverage
• unify GH Codespaces / Local DevContainer definitions

[zeriyoshi]

@copilot resolve the merge conflicts in this pull request

[Copilot]

Pull request overview

Updates the Pskel skeleton/tooling to align with upstream PHP changes by switching licensing to BSD-3-Clause, refreshing the LLVM toolchain in the dev image, and adjusting the extension initialization flow to better support modern PHP/ext_skel setups.

Changes:

• Update licensing references and LICENSE contents to BSD-3-Clause.
• Update Debian-based container setup to use the LLVM 22 apt repository + packages.
• Enhance pskel init argument parsing (optional vendor) and generate a composer.json for newer PHP versions; add devcontainer post-create symlink for pskel.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pskel.sh	Updates init argument handling and composer.json generation for new skeletons.
Dockerfile	Switches LLVM installation to v22 using signed apt repo and updates alternatives.
LICENSE	Replaces PHP License 3.01 text with BSD-3-Clause text/copyright lines.
README.md	Updates displayed license identifier.
README_ja.md	Updates displayed license identifier.
ext/.gitignore	Adds ignore rules for build artifacts generated under /ext.
ext/.gitkeep	Normalizes content/format (keeps uninitialized marker).
.gitattributes	Adds export-ignore rules for archive exports.
.devcontainer/devcontainer.json	Adds workspace folder + post-create symlink for pskel.
.devcontainer/local/devcontainer.json	Adds post-create symlink for pskel.

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[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved and pushed in 79aff63 (with a small follow-up in 51411d7). The PR branch now cleanly merges main with conflicts fixed in pskel.sh. No UI changes in this PR, so there is no screenshot to share.