feat: add checkhealth script

integration-tests/cypress/e2e/cmp-rg/health_spec.cy.ts

@@ -0,0 +1,12 @@
+describe("the healthcheck", () => {
+  it("does not show any errors when ripgrep is installed", () => {
+    cy.visit("http://localhost:5173")
+    cy.startNeovim().then(() => {
+      // wait until text on the start screen is visible
+      cy.contains("If you see this text, Neovim is ready!")
+
+      cy.typeIntoTerminal(":checkhealth blink-cmp-rg{enter}")
+      cy.contains("OK blink-cmp-rg")
+    })
+  })
+})

lua/blink-cmp-rg/health.lua

@@ -0,0 +1,13 @@
+-- see :help :checkhealth
+-- https://github.com/neovim/neovim/blob/b7779c514632f8c7f791c92203a96d43fffa57c6/runtime/doc/pi_health.txt#L17
+return {
+  check = function()
+    vim.health.start("blink-cmp-rg")
+
+    if vim.fn.executable("rg") ~= 1 then
+      vim.health.warn("rg (ripgrep) not found on PATH")
+    end
+
+    vim.health.ok("blink-cmp-rg")
+  end,
+}