Fix rollup build

[OBrezhniev]

This pull request updates both the CI workflow and the way file system constants are imported and used in the codebase. The main goals are to modernize CI Node.js version handling and to standardize the import of file system constants for better compatibility and clarity.

CI/CD Workflow Improvements:

• The CI workflow now only runs on pushes to the main branch and on pull requests, instead of all branches. (.github/workflows/ci.yml)
• Node.js versions in the CI matrix now use lts/* and lts/-1 for broader and more future-proof coverage, and the actions/setup-node action is updated to v4. (.github/workflows/ci.yml)

File System Constants Refactoring:

• In src/fastfile.js, file system constants are now imported directly from the constants module, rather than destructured from fs.constants, improving clarity and compatibility. (src/fastfile.js)
• In build/main.cjs, all uses of file system constants are updated to reference constants (e.g., constants.O_TRUNC) instead of relying on destructured variables, and the constants module is explicitly required. (build/main.cjs) [1] [2] [3] [4] [5] [6] [7]

[Copilot]

Pull request overview

This PR aims to fix the Rollup build by switching Node builtin fs imports to the node:fs specifier and updating the generated CJS bundle accordingly.

Changes:

• Updated src/fastfile.js to import fs constants from node:fs.
• Updated the generated build/main.cjs bundle to use node:fs for constants.
• Updated package-lock.json metadata for several packages (adds "peer": true flags).

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/fastfile.js	Switches fs constants import to node:fs to influence bundling/builtin resolution.
build/main.cjs	Reflects the node:fs change in the built CJS output (adds an extra require + uses node_fs.constants).
package-lock.json	Lockfile metadata changes (peer flags) likely from npm lockfile regeneration.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated no new comments.

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