feat: implement health checks

lua/watchexec/health.lua

@@ -0,0 +1,24 @@
+local M = {}
+
+function M.check()
+  if vim.fn.has("nvim-0.10") == 0 then
+    vim.health.error("Neovim 0.10 or higher is required", { "Please upgrade your Neovim installation to v0.10+" })
+    return
+  end
+
+  vim.health.start("watchexec.nvim diagnostics")
+  vim.health.ok("Neovim 0.10+ is installed")
+
+  local bin_path = "watchexec"
+
+  if vim.fn.executable(bin_path) == 1 then
+    vim.health.ok(string.format("Binary '%s' is installed and executable", bin_path))
+  else
+    vim.health.error(string.format("Binary '%s' was not found in PATH", bin_path), {
+      "Install watchexec",
+      "Or verify your plugin configuration if using a custom binary path.",
+    })
+  end
+end
+
+return M

lua/watchexec/init.lua

@@ -1,7 +1,7 @@
 local M = {}
 
 M.config = {
-  greeting = "Hello from my plugin"
+  greeting = "Hello from my plugin",
 }
 
 function M.setup(opts)