[feature request] Allow page-specific rules and metadata placeholders

[kzhovn]

My usecase: in notes for projects that have an associated public github repo, I want to be able to link issues via the standard #issuenum syntax. I don't want this rule to fire anywhere else.

The implementation I was imagining was setting a cssclass for which the rule is active, and then allowing a rule to grab metadata via a placeholder like {{meta:FieldName}} (MetaEdit's API could help with this). The final rule would looks something like

cssclass: github-project
regex: #([0-9]+)
link: {{meta:repo-url}}/issue/($1)

I do something similar in URI Commands, though without setting a cssclass, and might be up for implementing this a little later if you think it's in scope.

[27escape]

Being able to link to a file or directory within the current vault would be really useful to me too - thanks