Add codecov yaml

.codecov.yml

@@ -0,0 +1,43 @@
+coverage:
+  precision: 2
+  round: down
+  range: "70...100"
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 5%
+        base: auto
+        branches:
+          - main
+        if_ci_failed: error
+        informational: true
+        only_pulls: false
+    patch: off
+
+comment:
+  layout: "reach, diff, flags, files"
+  behavior: default
+  require_changes: false
+  require_base: no
+  require_head: yes
+  branches:
+    - "main"
+
+parsers:
+  solidity:
+    enable_partials: yes
+
+ignore:
+  - "test/**/*"
+
+flags:
+  foundry:
+    paths:
+      - "src/"
+    carryforward: true
+
+fixes:
+
+github_checks:
+  annotations: true