gitignore: add .envrc for the direnv users

authored by winter.bsky.social and committed by Tangled a73e3189 8af798f5

+1
+1
.gitignore
··· 14 .DS_Store 15 .env 16 *.rdb
··· 14 .DS_Store 15 .env 16 *.rdb 17 + .envrc