Change package manager to yarn (#374)

* chore: install dependencies using yarn

* chore: change references of npm command to yarn

* chore: use npm for workers-site

* chore: revert workers-site changes

* fix: pin gatsby-plugin-google-tagmanager and gatsby-plugin-typescript versions to avoid plugin incompatibility issue

Co-authored-by: Temitayo Fadojutimi <temitayo.fadojutimi@cloudflare.com>

Author: adesege

bin/commands.sh

@@ -34,8 +34,8 @@ if [ "$1" = "ghactionsbootstrap" ]; then
   echo "Entering .docs"
   cd .docs
 
-  echo "Running npm install inside .docs"
-  npm install
+  echo "Running yarn install inside .docs"
+  yarn install --pure-lockfile
 fi
 
 
@@ -51,11 +51,11 @@ if [ "$1" = "bootstrap" ]; then
   echo "Entering .docs"
   cd .docs
 
-  echo "Removing existing node_modules (local npm link case)"
+  echo "Removing existing node_modules (local yarn link case)"
   rm -rf node_modules/
 
-  echo "Running npm install inside .docs"
-  npm install
+  echo "Running yarn install inside .docs"
+  yarn install --pure-lockfile
 fi
 
 
@@ -89,11 +89,11 @@ if [ "$1" = "develop" ]; then
   echo "Entering .docs"
   cd .docs
 
-  echo "Running npm run clean"
-  npm run clean
+  echo "Running yarn clean"
+  yarn clean
 
-  echo "Running npm run develop"
-  npm run develop -- "${@:2}"
+  echo "Running yarn develop"
+  yarn develop "${@:2}"
 fi
 
 
@@ -105,8 +105,8 @@ if [ "$1" = "build" ]; then
   echo "Entering .docs"
   cd .docs
 
-  echo "Running npm run build"
-  npm run build -- "${@:2}"
+  echo "Running yarn build"
+  yarn build "${@:2}"
 
   # We must run from inside `.docs/`
   echo "Running bin/postbuild.js"
@@ -120,8 +120,8 @@ if [ "$1" = "serve" ]; then
   echo "Entering .docs"
   cd .docs
 
-  echo "Running npm run serve"
-  npm run serve -- "${@:2}"
+  echo "Running yarn serve"
+  yarn serve "${@:2}"
 fi