fix: nvim: julials add generation of precompile head & add readme

bin/neovim/readme.md

@@ -0,0 +1,27 @@
+# How to manage Julia Language Server
+This config use sysimage built with PackageCompiler to make language server startup faster.
+Scripts in this directory is for management of sysimage.
+
+# description
+all related process is done in project at `~/.julia/environments/nvim-lspconfig/`.
+
+## startup
+```sh
+$ ./setup_julials.sh
+```
+which executes `add_dependencies.jl` internally.
+
+## update
+```sh
+$ ./update_julials.sh
+```
+which updates project, compile sysimage, then do precompile.
+
+# effect
+Start up got about x3 - x4 faster.
+It still takes some time to load packages though.
+
+# TODO
+- [ ] Not sure all necessary packages are listed in add_dependencies.jl
+- [ ] Maybe it's better to set up different sysimages for each projects
+