Bump version to v15.prerelease

Bump version to v14

doc: re-render markdown versions of man pages

Gemroff_Tests.Parsing: Fix incorrect copyright header

*: Add emdash configuration option

Primarily to allow avoiding Unicode characters when rendering.

*: Add ellipsis configuration parameter

Primarily to allow using non-Unicode if you want pure ASCII in textual formats
or such.

Rendering.Render_{Gemtext,Textual}: Handle multi-paragraph/line footnotes

Fix bug where all but the last paragraph/line of a multi-line footnote would be
emitted inline, rendering the text and footnote nonsensical.  Still need to fix
bug with line wrapping with embedded newlines in the emitted string.

Rendering.Render_Textual: don't wrap inline links

Fix bug where long inline links would be wrapped when emitted in the footnote,
breaking the link.  Writing normal non-inline links already had this issue
fixed.

Rendering.Render_HTML: fix additional bugs with unordered list handling

Fix alire.toml version number

Bump version to v14.prelease

Bump version to v13

Rendering.Render_HTML: render multiline unordered list items identically to single-line items

This fixes some minor issues with how multiline unordered list blocks were
treated distinctly and would, for instance, have <p></p> tags inside the
<li></li>, plus some non-significant whitespace differences.  Now multiline
list items are rendered identically to single-line list items (other than the
possibility of rendered markup)

Rendering.Render_HTML: fix bug with consecutive multiline list items

Fix bug where having consecutive multiline unordered list items would open a
new <ul> block and not properly close them.  Add test to ensure it doesn't
recur.

README: add note about prebuilt binaries

.builds: save artifacts from all scripts

.builds: generate build artifact for executable

Bump version to v13.prerelease

Bump version to v12

Gemroff: Add unordered list item blocks

This allows using inline markup inside of unordered list items, using standard
block syntax.