This PR updates tooling and project config to align with Zig 0.15.2, refreshes Bun version files, and adds editor/project metadata plus a broader .gitignore. It also updates docs and build logic to match the newer Zig APIs and current Bun versions.

Changes

• Bump minimum Zig version requirement to 0.15.2 and update build APIs/formatting for Zig 0.15.x compatibility.
• Update CI setup to use Zig 0.15.2.
• Refresh Bun version files to 1.3.6 (.bun-version, .tool-versions, package.json).
• Update README examples (Bun 1.3.6, bunv help), and standardize badges to Markdown.
• Adjust vm.zig HTTP client flow and IO usage for Zig 0.15.x APIs.
• Update .gitignore to include more platforms/runtimes; add JetBrains .idea project files.

Testing

• zig build (Zig 0.15.2)

Notes

• Running zig build bun / zig build bunx still triggers bunv’s install prompt if ~/.bunv/versions is empty (non-interactive runs will abort).

Related

Closes #31
Based on #32