Escape strings containing font glyphs (Nerd Font compatibility)

[JanDeDobbeleer]

This fixes an issue with Nerd Font glyphs (and others, but this is my use-case) not being recognised resulting in a non-quoted string, which in YAML makes them literal text rather than icons. This breaks config exports and migrations for oh-my-posh.

Example:

map[string]string{"v": "\ue0b6"},

Is encoded to YAML as:

v: \ue0b6

But that should be:

v: "\ue0b6"

The isEmoticon function is the same as the one we use for oh-my-posh which has worked without issues so far.

[JanDeDobbeleer]

@goccy are you still maintaining this? I don't mind using my fork, but it would be amazing to get a conversation started around this.

[codecov-commenter]

Codecov Report

Merging #343 (5f846f9) into master (31fe1ba) will not change coverage.
Report is 1 commits behind head on master.
The diff coverage is n/a.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #343   +/-   ##
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  Coverage   76.02%   76.02%           
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  Files          13       13           
  Lines        4692     4692           
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  Hits         3567     3567           
  Misses        866      866           
  Partials      259      259           

[goccy]

Thank you for your contribution !! I've some commented.

[JanDeDobbeleer]

@goccy only relevant changes remaining. And sorry it took me THIS long to address this again. Really bad behaviour....