feat: multi subtopic enhancements (#1320)

* feat(doc): Multi supports nested topics --maxmultiNestedTopicsDepth flag

* feat(doc): multi respects topic separator

* fix: maintain original multi output by default

* chore: eslintignore test fixtures

* chore: go back to ts-node

---------

Co-authored-by: Gaël Motte <gael.motte@gmail.com>

.eslintignore

@@ -2,3 +2,4 @@
 /lib
 /templates
 /tmp
+/test/fixtures

.github/CONTRIBUTING.md

@@ -6,4 +6,4 @@ The `test/integration` requires Github Actions to run on the various OS under te
 
 These tests requires keys for uploading and promoting artifacts to S3 (and testing optional functions like signing).
 
-In GHA, set `PRESERVE_ARTIFCATS` to `true` to prevent the tests from deleting the artifacts.  This is useful if you want to retrieve them from their buckets to manually test on different systems.
+In GHA, set `PRESERVE_ARTIFCATS` to `true` to prevent the tests from deleting the artifacts. This is useful if you want to retrieve them from their buckets to manually test on different systems.

.mocharc.json

@@ -1,16 +1,8 @@
 {
   "recursive": true,
   "reporter": "spec",
-  "require": [
-    "test/helpers/init.js",
-    "ts-node/register"
-  ],
+  "require": ["test/helpers/init.js", "ts-node/register"],
   "timeout": 60000,
-  "watch-extensions": [
-    "ts"
-  ],
-  "watch-files": [
-    "src",
-    "test"
-  ]
+  "watch-extensions": ["ts"],
+  "watch-files": ["src", "test"]
 }