readTree method on UrlReader (#2925)

* Basic implementation of readTree on github and use it in techdocs

* Added a UrlPreparer and cleaned up some minor things

* Download entire archive and filter out the wanted files in readTree

* Added test for dir output of tree reader

* Fixed formatting

* Fixed formatting

* Some cleanups and fixes

* Fix typing issues

* Fix prettier

* Fix prettier

* Removed unused dependency

* Fixed comments on PR

* Prettier

* Moved @types/fs-extra to devDeps

* Fixed another PR comment

* Added a test for getDocFilesFromRepository

* Prettier

yarn.lock

@@ -4916,6 +4916,13 @@
   dependencies:
     "@types/express" "*"
 
+"@types/concat-stream@^1.6.0":
+  version "1.6.0"
+  resolved "https://registry.npmjs.org/@types/concat-stream/-/concat-stream-1.6.0.tgz#394dbe0bb5fee46b38d896735e8b68ef2390d00d"
+  integrity sha1-OU2+C7X+5Gs42JZzXoto7yOQ0A0=
+  dependencies:
+    "@types/node" "*"
+
 "@types/connect-history-api-fallback@*":
   version "1.3.3"
   resolved "https://registry.npmjs.org/@types/connect-history-api-fallback/-/connect-history-api-fallback-1.3.3.tgz#4772b79b8b53185f0f4c9deab09236baf76ee3b4"
@@ -5109,6 +5116,13 @@
   dependencies:
     "@types/node" "*"
 
+"@types/fs-extra@^9.0.3":
+  version "9.0.3"
+  resolved "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-9.0.3.tgz#9996e5cce993508c32325380b429f04a1327523e"
+  integrity sha512-NKdGoXLTFTRED3ENcfCsH8+ekV4gbsysanx2OPbstXVV6fZMgUCqTxubs6I9r7pbOJbFgVq1rpFtLURjKCZWUw==
+  dependencies:
+    "@types/node" "*"
+
 "@types/git-url-parse@^9.0.0":
   version "9.0.0"
   resolved "https://registry.npmjs.org/@types/git-url-parse/-/git-url-parse-9.0.0.tgz#aac1315a44fa4ed5a52c3820f6c3c2fb79cbd12d"
@@ -22456,7 +22470,7 @@ tar@^4, tar@^4.4.10, tar@^4.4.12, tar@^4.4.8:
     safe-buffer "^5.1.2"
     yallist "^3.0.3"
 
-tar@^6.0.1, tar@^6.0.2:
+tar@^6.0.1, tar@^6.0.2, tar@^6.0.5:
   version "6.0.5"
   resolved "https://registry.npmjs.org/tar/-/tar-6.0.5.tgz#bde815086e10b39f1dcd298e89d596e1535e200f"
   integrity sha512-0b4HOimQHj9nXNEAA7zWwMM91Zhhba3pspja6sQbgTpynOJf+bkjBnfybNYzbpLbnwXnbyB4LOREvlyXLkCHSg==