update and add MDN Plus legal docs (#12129)

* update and add MDN Plus legal docs

* chore(deps): updated yarn.lock

Co-authored-by: Florian Dieminger <me@fiji-flo.de>
Co-authored-by: fxa-bananafox[bot] <70546514+fxa-bananafox[bot]@users.noreply.github.com>

yarn.lock

@@ -12987,40 +12987,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"aws-sdk@npm:^2.1089.0":
-  version: 2.1089.0
-  resolution: "aws-sdk@npm:2.1089.0"
-  dependencies:
-    buffer: 4.9.2
-    events: 1.1.1
-    ieee754: 1.1.13
-    jmespath: 0.16.0
-    querystring: 0.2.0
-    sax: 1.2.1
-    url: 0.10.3
-    uuid: 3.3.2
-    xml2js: 0.4.19
-  checksum: ad31c214a14cded9777c894b011f21ea54594412b1ceba51a28189d03c0b7a2cc04973bfa72a05fe15e09c43dae73e491b4c745bc3aef6d12bbb30ef39d33994
-  languageName: node
-  linkType: hard
-
-"aws-sdk@npm:^2.1089.0":
-  version: 2.1089.0
-  resolution: "aws-sdk@npm:2.1089.0"
-  dependencies:
-    buffer: 4.9.2
-    events: 1.1.1
-    ieee754: 1.1.13
-    jmespath: 0.16.0
-    querystring: 0.2.0
-    sax: 1.2.1
-    url: 0.10.3
-    uuid: 3.3.2
-    xml2js: 0.4.19
-  checksum: ad31c214a14cded9777c894b011f21ea54594412b1ceba51a28189d03c0b7a2cc04973bfa72a05fe15e09c43dae73e491b4c745bc3aef6d12bbb30ef39d33994
-  languageName: node
-  linkType: hard
-
 "aws-sign2@npm:~0.7.0":
   version: 0.7.0
   resolution: "aws-sign2@npm:0.7.0"