Add optional Shipwright Triggers deployment support

[IrvingMg]

Changes

Add optional Shipwright Triggers deployment support via spec.triggers.enable on the ShipwrightBuild CR.

• Introduce a new TriggersSpec field and pkg/triggers package
• Upgrade the TektonConfig profile from "lite" to "base" when enabled
• Perform cleanup on disable or CR deletion
• Add RBAC for triggers resources and Tekton API permissions

Related Issue

Fixes #240

Type of PR

/kind feature

Submitter Checklist

• Includes tests if functionality changed/was added
• Includes docs if changes are user-facing
• Kind label has been set
• Release notes block has been filled in, or marked NONE

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Release Notes

Add optional Shipwright Triggers support. Set `spec.triggers.enable: true` on the ShipwrightBuild CR to deploy the Triggers controller alongside Shipwright Build.

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[IrvingMg]

@shipwright-io/contributors PTAL