Add auto PR generation (#48)

* Remap 1.21.6 to Mojang mappings

* start working on automation

* update newVersion script to use manifest

* update scripts

* update doc

* add dispatchable bump workflow

* update workflow env

* update workflows

.github/workflows/commands.yml

@@ -0,0 +1,19 @@
+name: Repo Commands
+
+on:
+  issue_comment:        # Handle comment commands
+    types: [created]
+  pull_request_target:  # Handle renamed PRs
+    types: [edited]
+
+jobs:
+  comment-trigger:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v3
+    - name: Run command handlers
+      uses: PrismarineJS/prismarine-repo-actions@master
+      with:
+        # NOTE: You must specify a Personal Access Token (PAT) with repo access here. While you can use the default GITHUB_TOKEN, actions taken with it will not trigger other actions, so if you have a CI workflow, commits created by this action will not trigger it.
+        token: ${{ secrets.PAT_PASSWORD }}