add theme color ogp tag

[bnidevs]

No description provided.

[vcfxb]

This looks good, but does not fit with our current dynamic OGP tag system. Do we want theme color to be specifically static, or at least until it gets refactorred to be dynamic?

[bnidevs]

do .hbs files not allow for a combination of static and dynamic content?

[vcfxb]

No they do, I'm just saying that this breaks the pattern established by the other ogp tags being dynamic, and there should be a comment/justification on why that's the case with this one.

[bnidevs]

This meta tag strictly modifies the color theme of the blocks that are displayed on Discord/elsewhere, and I assumed it could be consistent across all usages of Telescope, unless you want varying colors based on link type?

[vcfxb]

It might be nice to make any telescope link that errors out red, in theory. Although, after further consideration, that would be a bunch of work and a single color across-the-board is probably fine for now. This gets my approval