feat: add some new language server

[ekickx]

elm-language-server, intelephense, lua-sumneko, tailwindcss-intellisense

[codecov[bot]]

Codecov Report

Merging #40 (d96fdd4) into master (e2672ea) will increase coverage by 0.23%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #40      +/-   ##
==========================================
+ Coverage   71.82%   72.05%   +0.23%     
==========================================
  Files          13       13              
  Lines         472      476       +4     
==========================================
+ Hits          339      343       +4     
  Misses         72       72              
  Partials       61       61              

Impacted Files	Coverage Δ
app/app.go	70.77% <100.00%> (+0.77%)	:arrow_up:

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