Customised counter styles are unavailable

[r12a]

Customisable counters are needed for many languages.

There is no way for users to create local counter styles that are not built in to the browser, and users also often want to tweak the counter style in some way (esp. the prefix/suffix).

The bengali numeric counter style appears to be supported by the big 3 engines, and unless other styles (apart from eastern-nagari, which is the same thing) are needed, we seem to have no issues here. However, the only prefix/suffix supported by browsers is the full stop. Others should be allowed, where the user wants.

For more details, see this GitHub issue, which is being used to track this gap. Please add any discussion there, and not to this issue.

[r12a]

The first comment in this issue contains text that will automatically appear in the Bengali gap-analysis document as a subsection with the same title as this issue. Any edits made to that comment will be immediately available in the document. Proposals for changes or discussion of the content can be made in comments below this point.

[r12a]

Closing in favour of issue 93, which is also in the IIP repo.