In editor tutorials: Welcome dialog and table of contents [MTT-8698], [MTT-8694] (#888)

* chore: upgrade to 2022.3.27f1 LTS
chore: upgraded IET package to 4.0.2

* chore: added tutorial authoring tools

* feat: added tutorial welcome dialog and table of contents

* chore: removed obsolete "Readme" welcome dialog mechanism, as it is superseeded by In-editor tutorials welcome dialog

* chore: re-arranged table of contents

* chore: welcome dialog is displayed at startup

* chore: removed placeholder

* chore: enabled "table of contents closed dialog"

* chore: removed "Start tutorials" option from IET's welcome dialog as the project has no tutorials at the moment

* chore: updated changelog

* chore: fixed namespace and naming, removed unneeded code

* chore: added project layout to ensure all users start with the same bossroom screen on FTUE

* chore: updated copy of Welcome Dialog to remove the need of scrollbars

* Trigger Build

* chore: updated VMs versions for CI

* chore: upgraded unity-downloader-cli as it used an obsolete version that made tests fail

* chore: ci now uses the pre-compiled unity installer, as it is the recommended practice

* Revert "chore: ci now uses the pre-compiled unity installer, as it is the recommended practice"

This reverts commit b936762.

* Revert "chore: upgraded unity-downloader-cli as it used an obsolete version that made tests fail"

This reverts commit 324b260.

Author: RikuTheFuffs

.yamato/project-pack.yml

@@ -5,7 +5,7 @@ pack_{{ project.name }}:
   name: Pack {{ project.name }}
   agent:
     type: Unity::VM
-    image: package-ci/ubuntu:stable
+    image: package-ci/ubuntu-22.04:v4
     flavor: b1.small
   commands:
     - npm install upm-ci-utils@stable -g --registry https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-npm

.yamato/project.metafile

@@ -2,7 +2,7 @@
 test_platforms:
   - name: win
     type: Unity::VM
-    image: package-ci/win10:v4
+    image: package-ci/win10:v4.36.0
     flavor: b1.large
     editorpath: .Editor\Unity.exe
     utr: .\utr.bat
@@ -14,7 +14,7 @@ test_platforms:
     utr: ./utr
   - name: ubuntu
     type: Unity::VM
-    image: package-ci/ubuntu-18.04:v4
+    image: package-ci/ubuntu-22.04:v4
     flavor: b1.large
     editorpath: .Editor/Unity
     utr: ./utr

Assets/Scripts/Editor/Readme.meta renamed to Assets/Editor.meta

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f0ac9451724cbceb81d118990dd202b7147fc162dfcc1f44e7ab07c751b26614
+size 3777