feat: block layout for long/multiline/markdown changelog entries

[theoephraim]

Problem

Both changelog formatters always jammed the entry description onto the same line as the metadata, e.g. - #50 (major) Thanks @Saeris! - <summary>. That reads fine for a short one-liner, but badly when the summary is markdown or long (see discordkit's CHANGELOG).

Change

Added a shared heuristic summaryNeedsBlockLayout() that switches an entry to a block layout — metadata on its own line, summary indented below — when the summary is any of:

• multi-line (>1 non-empty line),
• long (first line >120 chars), or
• markdown-ish — contains a block-level construct (# heading, list item, > blockquote, ```/~~~ fence, table row), anchored to line starts so a stray | in prose doesn't trigger it.

Short single-line summaries stay inline exactly as before. The block path also now preserves internal blank lines so markdown paragraphs/lists render correctly. Applied to both the default and github formatters.

- *(minor)* Added a new flag to the CLI          ← short stays inline

- [#50](…) *(major)* Thanks [@Saeris](…)!         ← markdown/long/multiline → block
  ## New config option
  You can now set `foo` in your config

Thresholds live as single constants (INLINE_SUMMARY_MAX_LENGTH, MARKDOWN_BLOCK_RE) in changelog.ts.

Tests

• Full suite: 309 pass / 0 fail.
• Added inline / long / markdown / multi-paragraph cases for both formatters; updated the one existing test that asserted the old inline-multiline behavior.
• oxlint + tsc --noEmit clean.

[github-actions]

The changes in this PR will be included in the next version bump.

Patch releases

• @varlock/bumpy 1.14.0 → 1.14.1

Bump files in this PR

• changelog-block-layout.md (view diff) (edit)

Click here if you want to add another bump file to this PR

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