docs: clarify microvm/firecracker intro and fix lint config

Author: syscod3

.golangci.yml

@@ -22,6 +22,8 @@ linters:
         - name: exported
           disabled: true # doc comments not required yet
   exclusions:
+    paths:
+      - test/
     rules:
       - path: _test\.go
         linters:
@@ -37,7 +39,3 @@ formatters:
     goimports:
       local-prefixes:
         - github.com/syscode-labs/imp
-
-issues:
-  exclude-dirs:
-    - test

README.md

@@ -17,6 +17,7 @@
 
 Imp is a Kubernetes operator and node agent for running Firecracker microVM workloads as first-class Kubernetes resources.
 In plain terms: it gives you lightweight mini-VMs that behave like disposable app sandboxes, so you can run risky or isolated workloads without giving them access to your whole host.
+A microVM is a very small virtual machine with stronger isolation than a container, and Firecracker is the open-source microVM runtime Imp uses to start those sandboxes quickly.
 
 It provides CRDs for VM lifecycle, VM networking, snapshots, migrations, warm pools, and runner pools, with Cilium-first networking support, VXLAN fallback for non-Cilium CNIs, and built-in metrics for VM state, latency, and health.