chore(deps): update @oclif/core to v4 and @adobe/eslint-config-aio-lib-config to v5

[shazron]

Fixes #792

Summary

• Updates @oclif/core from 2.16.0 to ^4.9.0 (closes chore: update @oclif/core to latest version #792)
• Updates @oclif/plugin-not-found from ^2.3.26 to ^3 (required for core v4 compatibility)
• Updates @adobe/eslint-config-aio-lib-config from ^4.0.0 to ^5.0.0
• Migrates ESLint config from legacy .eslintrc.json files to ESLint 9 flat config (eslint.config.js)
• Swaps out old standard plugins (eslint-config-standard, eslint-plugin-import, eslint-plugin-n, eslint-plugin-node, eslint-plugin-promise) for neostandard
• Updates eslint from ^8 to ^9 and eslint-plugin-jest from ^27 to ^28

Breaking changes addressed

Change	Fix
Config.plugins is now a Map (was an array)	Use config.getPluginsList() in rollback.js and update.js
ux.table() removed from @oclif/core	New src/table.js helper with identical column-definition API
Command.parse() now calls config.runHook() internally	Added runHook mock to test configs
ESLint 9 uses flat config by default	Migrated to eslint.config.js

Test plan

• All 53 existing tests pass
• 100% code coverage maintained
• Lint passes cleanly

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[Copilot]

Pull request overview

Updates the CLI’s dependency/tooling stack to support @oclif/core v4 and ESLint 9, including required code/test adjustments for breaking changes.

Changes:

• Bumped @oclif/core to v4 (and @oclif/plugin-not-found to v3) and adapted plugin enumeration + hooks in commands/tests.
• Replaced removed ux.table() usage with a new src/table.js helper.
• Migrated from legacy .eslintrc.json files to ESLint 9 flat config (eslint.config.js) and switched standard plugin set to neostandard.

Reviewed changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/commands/update.js	Switches from ux.table to printTable and uses config.getPluginsList() for oclif v4 compatibility.
src/commands/rollback.js	Uses printTable and config.getPluginsList() to align with oclif v4 changes.
src/commands/discover.js	Uses printTable instead of ux.table.
src/table.js	Adds a table-printing helper intended to replace ux.table().
test/commands/update.test.js	Updates command config mocks to include runHook and getPluginsList.
test/commands/rollback.test.js	Updates command config mocks to include runHook and getPluginsList.
test/commands/discover.test.js	Updates command config mock to include runHook.
eslint.config.js	Introduces ESLint 9 flat config and test/e2e overrides (incl. setFetchMock global).
.eslintrc.json	Removes legacy root ESLint config.
test/.eslintrc.json	Removes legacy test ESLint config (moved into flat config override).
e2e/.eslintrc.json	Removes legacy e2e ESLint config (moved into flat config override).
package.json	Updates oclif/eslint deps and replaces standard plugin set with neostandard.
package-lock.json	Locks updated dependency graph for the above upgrades.
.github/workflows/node.js.yml	Drops Node 18 from the CI matrix.
.github/workflows/daily-install-cli.yml	Drops Node 18 from the daily install matrix.

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