[CI] Adds formatter to CI (#6272)

* Adds formatters CI

Adds Error message & setup formatting like cpp

Adds Swift

Adds typescript

Adds python

tests yarn

Adds format.md

* Removes unneeded scripts + moves install script to install phase

* Adds format.md content

* Adds cpp to the formatter.md and fixes ci

* Adds cpp to formatter ci

.travis.yml

@@ -200,3 +200,11 @@ matrix:
       script:
         - cmake -DFLATBUFFERS_BUILD_TESTS=OFF -DFLATBUFFERS_BUILD_FLATLIB=OFF -DFLATBUFFERS_BUILD_FLATHASH=OFF .; make; export PATH="$PATH:${PWD}"
         - cd android; ./gradlew clean build
+
+    - language: generic
+      os: linux
+      install:
+        - bash .travis/format_install.sh
+        
+      script:
+        - bash .travis/format_check.sh