✨ Add automated schema generation and validation for deploymentConfig

Summary:

Implements Phase 1 of the DeploymentConfig feature to achieve feature parity with
OLMv0's SubscriptionConfig for registry+v1 bundles.

RFC: https://docs.google.com/document/d/18O4qBvu5I4WIJgo5KU1opyUKcrfgk64xsI3tyXxmVEU/edit?tab=t.0#heading=h.x3tfh25grvnv

Details:

This PR adds infrastructure for JSON schema-based validation of the `deploymentConfig` field in ClusterExtension:

- **Schema Generation Tool**: Created reflection-based generator (`hack/tools/schema-generator/`)
that automatically introspects `v1alpha1.SubscriptionConfig` from `github.com/operator-framework/api`
to produce a JSON Schema Draft 7 document
- Handles nested k8s corev1 types recursively
- Supports inline/embedded struct fields
- Extracts field documentation from Go source via AST parsing
- Excludes `selector` field (unused in OLMv0)

- **Validation Infrastructure**: Added `internal/operator-controller/rukpak/bundle/schema/` package with:
  - Embedded JSON schema validator using `santhosh-tekuri/jsonschema/v6`
  - `ValidateDeploymentConfig()` function integrated into bundle config validation
  - Comprehensive test coverage

- **Regeneration Workflow**: Added `make update-deploymentconfig-schema` target to regenerate schema when
upstream SubscriptionConfig changes.

When the upstream `v1alpha1.SubscriptionConfig` adds new fields (e.g., new k8s corev1 types), running the
regeneration target will automatically include them in the schema without manual updates.

Addresses OPRUN-4112 (Phase 1)

Future PRs will implement:
- Phase 2: Renderer integration to apply deploymentConfig to Deployments
- Phase 3: Provider integration to extract deploymentConfig from bundles
- Phase 4: Documentation

Author: anik120

Makefile

@@ -222,6 +222,10 @@ fmt: $(YAMLFMT) #EXHELP Formats code
 update-tls-profiles: $(GOJQ) #EXHELP Update TLS profiles from the Mozilla wiki
 	env JQ=$(GOJQ) hack/tools/update-tls-profiles.sh
 
+.PHONY: update-deploymentconfig-schema
+update-deploymentconfig-schema: #EXHELP Update DeploymentConfig JSON schema by introspecting v1alpha1.SubscriptionConfig
+	hack/tools/update-deploymentconfig-schema.sh
+
 .PHONY: verify-crd-compatibility
 CRD_DIFF_ORIGINAL_REF := git://main?path=
 CRD_DIFF_UPDATED_REF := file://