Move pragmas completion to pragmas plugin

[alexnaspo]

• Move the basic pragmas completion from GCHIDE to the pragmas module
• Add closing pragmas snippet "-#}"

[jneira]

@alexnaspo thanks for your contribution, i think makes sense group all pragmasrelated code together. Are not tests about pragmas completion in the ghcide test suite? They should be moved too in that case

[alexnaspo]

@alexnaspo thanks for your contribution, i think makes sense group all pragmasrelated code together. Are not tests about pragmas completion in the ghcide test suite? They should be moved too in that case

@jneira It looks like the functionality for pragmas completion is actually already tested in the pragmas plugin, rather than in the ghcdie test suite. example:

haskell-language-server/plugins/hls-pragmas-plugin/test/Main.hs

Line 198 in 6fa3e64

[ testCase "completes pragmas" $ runSessionWithServer pragmasPlugin testDataDir $ do

- There are no tests that i can see in ghcide that need to be moved. I have edited the tests in the plugin to reflect the new functionality of closing braces