Add doc for IntelliJ (#22)

Readme.md

@@ -136,6 +136,9 @@ pipx install -e denbi-benten  # denbi-benten is the name of the directory with t
 
 See [this page](https://github.com/denbi/denbi-benten/blob/main/docs/vim.md) please.
 
+# Using with IntelliJ
+
+See [this page](https://github.com/rabix/benten/blob/master/docs/intellij.md) please.
 
 # Expression evaluations on hover
 

docs/intellij.md

@@ -0,0 +1,28 @@
+# Running Benten with IntelliJ
+
+## Install 
+
+1. Install Benten.
+2. Find the location of `benten-ls` (you will need that later.)
+3. Install the **LSP Support** plug-in: <https://plugins.jetbrains.com/plugin/10209-lsp-support>
+4. Open the IntelliJ Settings, and navigate to [ Languages & Frameworks > Language Server Protocol > Server Definitions ].
+5. Add an LSP entry as per screenshot below, entering the location of `benten-ls` found in step 2.
+
+![](../media/2021.11.13/lsp-definition-intellij.png)
+
+6. Finally, now navigate to [ Editor > TextMate Bundles ], click on the `+` (plus) sign, and select the directory of the `vscode-client` of Benten. You should see a new entry after you confirm your settings.
+
+![](../media/2021.11.13/lsp-editor.png)
+
+That's it, now you should be ready to open a CWL file with syntax highlighting and auto-complete.
+
+![](../media/2021.11.13/lsp-intellij.png)
+
+>NOTE: Language Server Protocol is not natively supported in IntelliJ,
+>so the installation notes here may need to be updated if the LSP Plug-in changes
+>or if IntelliJ changes its API.
+
+## References:
+
+- Robot Framework, “PyCharm with LSP”: https://forum.robotframework.org/t/pycharm-with-lsp/161
+