Add {lintr} precommit hook

Closes #1055

Author: IndrajeetPatil

.pre-commit-config.yaml

@@ -20,6 +20,11 @@ repos:
           tests/testmanual/addins/.*invalid.*|
           tests/testmanual/addins/r-valid\.R|
           )$
+      - id: lintr
+        additional_dependencies:
+          - r-lib/lintr
+        warn-only: true
+        verbose: True
       - id: roxygenize
         additional_dependencies:
           - r-lib/pkgapi