IMPR: Embeds and a crappy file viewer.

[XWasHere]

Checklist

• [x] I have read the Contributing Guidelines
• [x] I acknowledge that any submitted code will be licensed under the ISC License
• [x] I confirm that submitted code is my own work
• [x] I have tested the code, and confirm that it works

Enviroment

• Operating System: artix linux (Linux 6.5.5-arch1-1-custom x86_64 | openrc)
• Node version: v21.2.0
• npm version: 10.2.4
• pnpm version: 8.10.5

Description

adds opengraph embeds, template strings and a simple placeholder file viewer

templates are in the format of {{NAME|ARG|NAMEDARG=ARGVALUE}} so you can do something like A Sharex Server - {{FormatBytes|{{FileSize}}}} file uploaded by {{Uploader}}

template functions can be added in TemplateExecutor.prototype.createExecutor(). embeds can be configured using the embed object in the user config file.

[tycrek]

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