fix-dev: handle npm unavailable circumstance

\### Rationale
For vscode switching of branches where it doesn't always have a login
shell that commands are being run in

.husky/post-checkout

@@ -24,6 +24,10 @@ update_npm_dependencies() {
       log "Dependency requirements changed! This will take a few seconds..."
 
       local cmd="npm install --prefer-offline"
+      if ! command -v npm &>/dev/null; then
+        log "NPM not found on \$PATH, however '$cmd' is desired. Please accomplish manually."
+        return
+      fi
       log "$> $cmd"
       eval "$cmd"
     fi

.husky/post-merge

@@ -30,6 +30,10 @@ update_npm_dependencies() {
 
   if [ "$NEEDS_INSTALL" == true ]; then
     cmd="npm install"
+    if ! command -v npm &>/dev/null; then
+      log "NPM not found on \$PATH, however '$cmd' is desired. Please accomplish manually."
+      return
+    fi
     log "$> $cmd"
     eval "$cmd"
 

.husky/pre-commit

@@ -7,9 +7,14 @@ LOG_PREFIX="[.husky/pre-commit]"
 
 . "$(dirname "$0")/hook-utils.sh"
 
-log "$> npm run lint"
-if ! npm run lint; then
-  error "ERROR: Dirty code detected!"
-  error "Fix the lint errors before committing to the repository."
+if command -v npm &>/dev/null; then
+  log "$> npm run lint"
+  if ! npm run lint; then
+    error "ERROR: Dirty code detected!"
+    error "Fix the lint errors before committing to the repository."
+    exit -1
+  fi
+else
+  error "NPM not found on \$PATH, unable to run pre-commit lint hook."
   exit -1
 fi