chore: normalize .gitignore — add yarn.lock and .yarn, drop .pnpm-store

Author: B4nan

.gitignore

@@ -2,6 +2,7 @@ build
 dist
 build-docs
 node_modules
+yarn.lock
 *.log
 *.pid
 *.seed
@@ -28,7 +29,6 @@ storage
 .turbo
 test/e2e/**/packages
 
-# we use corepack, no need to commit yarn binary
 .yarn
 
 # Local vitest config overrides