WIP: Autodetected template in opm alpha render-template

[grokspawn]

Description of the change:
Various type changes and refactoring necessary to make opm alpha render-template capable of detecting the template type from sniffing its schema, as well as name standardization across all three template types (did I say THREE? Yes, because this is based on top of #1792), and a new factory-based creation pattern.

❗ only commit 13c696c is intended to be part of this activity, but since it's built on not-yet-delivered commits, they are along for the ride for now.

❗marking this WIP, because it is blocked by #1792

Motivation for the change:
Since we created a formal schema for the basic catalog template, it made much more sense for Template to be an interface for a creation/call pattern which was increasingly entrenched in users' tooling... so it was easy to put off. But since it was also largely a "move existing stuff around" activity (read: super simple operations with complex propagation and high potential for side effects), it seemed a great opportunity to see what Claude would do with it.

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

Assisted-by: Claude

[openshift-ci]

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[Copilot]

Pull Request Overview

This PR introduces template type auto-detection and refactors the template system to use an interface-based factory pattern. The changes enable opm alpha render-template to automatically detect template types from their schema field, standardize naming across all template types, and consolidate command structure.

Key Changes:

• Unified render-template command that supports both explicit type specification and automatic schema-based detection
• Introduced Template interface and factory pattern for creating template instances
• Added support for a third template type (substitutes) with release version handling

Reviewed Changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
cmd/opm/alpha/template/render.go	New unified rendering logic supporting both explicit and auto-detected template types
cmd/opm/alpha/template/cmd.go	Consolidated command structure accepting optional type and file arguments
cmd/opm/alpha/template/basic.go	Removed - functionality moved to package-level template
cmd/opm/alpha/template/semver.go	Removed - functionality moved to package-level template
alpha/template/template.go	New core interface definitions and registry for template factories
alpha/template/schema.go	Schema detection logic for auto-identifying template types
alpha/template/basic/basic.go	Refactored to implement Template interface with factory pattern
alpha/template/semver/semver.go	Refactored to implement Template interface with factory pattern
alpha/template/semver/types.go	Removed - types moved into semver.go
alpha/template/substitutes/substitutes.go	New substitutes template implementation
alpha/property/property.go	Added Release field to Package property for release versioning
alpha/model/model.go	Added release version support and normalized naming for bundles
alpha/declcfg/declcfg_to_model.go	Added release version parsing from package properties

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[codecov]

Codecov Report

❌ Patch coverage is 50.49020% with 101 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.44%. Comparing base (fdd31a1) to head (13c696c).

Files with missing lines	Patch %	Lines
alpha/template/basic/basic.go	0.00%	27 Missing ⚠️
alpha/template/template.go	0.00%	20 Missing ⚠️
alpha/template/substitutes/substitutes.go	76.25%	14 Missing and 5 partials ⚠️
alpha/template/schema.go	0.00%	14 Missing ⚠️
alpha/template/semver/semver.go	45.83%	13 Missing ⚠️
alpha/model/model.go	79.31%	6 Missing ⚠️
alpha/declcfg/declcfg_to_model.go	75.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1814      +/-   ##
==========================================
- Coverage   57.50%   57.44%   -0.06%     
==========================================
  Files         136      138       +2     
  Lines       12934    13102     +168     
==========================================
+ Hits         7438     7527      +89     
- Misses       4341     4413      +72     
- Partials     1155     1162       +7     

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[grokspawn]

Reducing the complexity of the else block here seemed not worthwhile, since the code is compact and well-documented, and due to the existing methods being called it introduced more complexity than it resolved.