feat: add ofm option to transform `<img>` tags with video exts into `<video>` (closes #463) (#664)
* enableVideoEmbed plugin
* enableVideoEmbed plugin
* enableVideoEmbed plugin
* enableVideoEmbed plugin
* enableVideoEmbed plugin
* cleaned up index validation, regex, conditional, no autoplay
* Update quartz/plugins/transformers/ofm.ts
Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>
* Update quartz/plugins/transformers/ofm.ts
Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>
* Update quartz/plugins/transformers/ofm.ts
Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>
* Update ofm.ts
* Update ofm.ts
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Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>