jdtls for both windows/linux and add diagnostic keybind

ftplugin/java.lua

@@ -1,6 +1,8 @@
+local home = os.getenv("HOME") or os.getenv("USERPROFILE")
 local config = {
-	cmd = { os.getenv('HOME') .. '/.local/share/java/jdtls/bin/jdtls' },
+	cmd = { home .. '/.local/share/java/jdtls/bin/jdtls'},
 	root_dir = vim.fs.dirname(vim.fs.find({'gradlew', '.git', 'mvnw'}, { upward = true })[1]),
 }
+
 require('jdtls').start_or_attach(config)
 

lua/config/set.lua

@@ -32,3 +32,5 @@ vim.g.c_syntax_for_h = 1
 
 vim.cmd.colorscheme("moonfly")
 
+vim.keymap.set('n', '<leader>d', vim.diagnostic.open_float, { noremap = true, silent = true })
+