Add complex expression support for filter/if/unless helpers

[satyajitnayk]

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• Like in https://github.com/jaredwray/fumanchu/blob/main/test/array.js#L91 we have expression like {{#filter array "d"}}AAA{{else}}BBB{{/filter}} can we add support for the following format too??

• 
  {{#filter array (gt id 123)}}AAA{{else}}BBB{{/filter}}

{{#filter array ((gt id 123) or (lte price 200))}}AAA{{else}}BBB{{/filter}} // gt, lte are custom helpers

{{#if (gt id 123)}}HI{{else}}BYE{{/if}}

{{#if ((gt id 123) or (lte price 200))}}HI{{else}}BYE{{/if}}

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[jaredwray]

@satyajitnayk - thanks for this suggestion. I was not planning to add that in but if you want to do a pull request and add it that would be great and happy to help on it.

[satyajitnayk]

@jaredwray I don't think I will be able to do so, due to certain constrains. But for sure will try it in near future.

[jaredwray]

@satyajitnayk - ok. Will close this out till you are ready