Add changelog bundle option for --files

[lcawl]

Summary

Adds a path-list source of truth for changelog bundle / changelog remove (option-mode --files and profile-mode newline-delimited path list), with implicit local sourcing for that filter.

Also adds a profile-friendly --force-local override so ad hoc bundles do not require changelog.yml edits.

Background

We've recently had multiple ad hoc updates to the release notes that (1) were not tied to product releases and (2) did not always have a relevant / useful PR or issue associated with them. Since prs and issues are optional fields in changelogs, this made me realize that we were missing a way to bundle that type of changelog.

Implementation details

Code

• --files filter on changelog bundle / changelog remove (comma-separated paths, repeated flags, or newline-delimited path list)
• Profile path lists — same positional slot as PR/issue URL lists; content auto-detected (.yaml/.yml paths vs GitHub URLs)
• --force-local on bundle (allowed in profile mode) to skip CDN without editing changelog.yml
• Path-list / --files always forces local entry sourcing
• rules.bundle still applies after file selection

Tests

• BundleFilesFilterTests.cs — option/profile/CDN/--force-local/rules cases
• Remove parity tests in ChangelogRemoveTests.cs

Docs

• Updated cmd-bundle.md, cmd-remove.md, bundle-changelogs.md, configure-changelogs-ref.md

Generative AI disclosure

1. Did you use a generative AI (GenAI) tool to assist in creating this contribution?

• Yes
• No

2. If you answered "Yes" to the previous question, please specify the tool(s) and model(s) used (e.g., Google Gemini, OpenAI ChatGPT-4, etc.).

Tool(s) and model(s) used: Cursor Grok 4.5