Add mod button-like placeholders in right click commands

[Mm2PL]

Pull request checklist:

• CHANGELOG.md was updated, if applicable
• swap context lookup order

Description

This also adds new placeholder input.text which returns the text the user has in their SplitInput. I've also changed behavior of CommandController to use variables given to it first then try to use global ones.

Some things I came up with:

/reply	/raw @reply-parent-msg-id={msg.id} PRIVMSG #{channel.name} :{input.text}	Sends a Twitch reply with the given text
/quote_reply	/raw @reply-parent-msg-id={msg.id} PRIVMSG #{channel.name} :{input.text} > {1+}	Sends a Twitch reply with the selected text/whole message
/translate	/openurl https://translate.google.com/?sl=auto&tl=en&text={1+}&op=translate	Opens Google Translate with the given message/selection

You can somewhat use right-click commands like normal ones even with custom placeholders:

/testing

/testing {input.text;NaM}

Will send testing {text in split input} if used from right-click command or NaM if not

[xel86]

Tested and works great! Thanks mm2pl

Edit: I do think its a bit weird that these new placeholders only work for commands when right clicking them rather than just typing like normal. I feel like the behavior of a command (other than the input) shouldn't change based on whether you type it or use the message context menu.

[zneix]

After a brief look code looks good, I'll test these changes later on 👌

[xHeaveny]

yea it works good

[pajlada]

Works as expected! Merge this it when you're happy with it @zneix