chore: update @oclif/core to v4 and migrate ESLint to v9 flat config

[shazron]

Fixes#391

Summary

• Upgrades @oclif/core from ^2.8.12 to ^4.0.0, resolving chore: update @oclif/core to latest version #391
• Replaces removed ux.table with a custom src/ux-table.js compatible with the CJS project (the official @oclif/table replacement is ESM-only)
• Upgrades @adobe/eslint-config-aio-lib-config to 5.0.0 and eslint to ^9.0.0
• Migrates ESLint config from legacy .eslintrc to eslint.config.js (flat config format required by ESLint v9)
• Upgrades oclif CLI to ^4.0.0 and eslint-plugin-jest to ^29.0.0

Breaking changes handled

• ux.table removed in v4 → custom table implementation preserving identical output format
• Command.parse() now requires this.config.runHook → patched in test setup for unit tests that instantiate commands directly
• _flags internal property removed → updated createTestFlagsFunction to check flags instead
• argv is now a writable class field → simplified test that previously used a getter-only Object.defineProperty

Test plan

• All 813 existing unit tests pass (npm test)
• ESLint reports no errors (npm run lint)
• 100% branch/line/statement coverage maintained

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[Copilot]

Pull request overview

Updates this plugin to work with the @oclif/core v4 ecosystem and ESLint v9, including adapting CLI output and test scaffolding to accommodate breaking changes introduced by oclif v4 and the ESLint flat-config migration.

Changes:

• Upgrade @oclif/core (and oclif dev tooling) to v4 and adjust tests for updated parsing/config expectations.
• Replace removed ux.table usage with a local src/ux-table.js implementation and update commands accordingly.
• Migrate from .eslintrc to eslint.config.js (ESLint v9 flat config) and update lint dependencies.

Reviewed changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/jest.setup.js	Patches Command.prototype.parse for unit tests and updates flag assertions for oclif v4.
test/commands/runtime/api/list.test.js	Simplifies argv-related test logic after command parsing changes.
src/ux-table.js	Adds a local table printer intended to replace ux.table.
src/commands/runtime/trigger/list.js	Switches table output from ux.table to local table().
src/commands/runtime/rule/list.js	Switches table output from ux.table to local table().
src/commands/runtime/property/get.js	Switches table output from ux.table to local table().
src/commands/runtime/package/list.js	Switches table output from ux.table to local table().
src/commands/runtime/namespace/list.js	Switches table output from ux.table to local table().
src/commands/runtime/namespace/get.js	Switches multiple table outputs from ux.table to local table().
src/commands/runtime/api/list.js	Removes prior argv workaround and uses local table() for output.
src/commands/runtime/activation/list.js	Switches table output from ux.table to local table().
src/commands/runtime/action/list.js	Switches table output from ux.table to local table().
package.json	Bumps oclif/core to v4 and updates ESLint/Jest lint tooling dependencies.
eslint.config.js	Introduces ESLint v9 flat config and test globals integration.
.gitignore	Adds .claude ignore entry.
.eslintrc	Removes legacy ESLint config (replaced by flat config).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[shazron]

@copilot apply changes based on the comments in this thread

[Copilot]

@copilot apply changes based on the comments in this thread

Applied all four review changes in commit dccc4a6:

1. src/ux-table.js maxWidth — removed maxWidth from minWidth calculation and now enforce it as a strict upper bound via Math.min. Header and data values that exceed the content area (w - 1) are truncated.
2. src/commands/runtime/activation/list.js Topmost column — added minWidth: 2 alongside the existing maxWidth: 2 so the decorator column stays exactly 2 chars wide regardless of data content.
3. test/commands/runtime/api/list.test.js — removed the "handles falsy argv gracefully" test, which was testing an oclif v2 workaround that no longer exists.
4. eslint.config.js — restored the jsdoc/tag-lines: ["error", "never", { startLines: null }] rule that was in the original .eslintrc.

Also added test/ux-table.test.js to cover the new maxWidth truncation and no-header branches, restoring 100% branch coverage.