doc: add eslint-plugin-markdown

* install eslint-plugin-markdown
* add doc/.eslintrc.yaml
* add `<!-- eslint-disable rule -->` or `<!-- eslint-disable -->`
  for the rest of problematic code
* .js files in doc folder added to .eslintignore
* update Makefile and vcbuild.bat

PR-URL: #12563
Refs: #12557 (comment)
Reviewed-By: Teddy Katz <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Timothy Gu <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>

Author: vsemozhetbyt

.eslintignore

@@ -7,3 +7,4 @@ test/tmp*/
 tools/eslint
 node_modules
 benchmark/tmp/
+doc/**/*.js

.eslintrc.yaml

@@ -1,5 +1,8 @@
 root: true
 
+plugins:
+  - markdown
+
 env:
   node: true
   es6: true