feat(doc): added spell checker for markdown

Signed-off-by: Frederic BIDON <fredbi@yahoo.com>

Author: fredbi

.github/all-mispelled.txt

@@ -0,0 +1,93 @@
+AllOf
+Args
+AutoSeed
+DCO
+ERGGLGKLK
+Formated
+Fuzzying
+GenerateMode
+GeneratorOpts
+GoDoc
+JSON
+README
+Schemas
+SetSeed
+Severa
+StubMode
+Stubmode
+USD
+UnitTest
+additionalItems
+additionalProperties
+appsawg
+args
+assignees
+benchmarking
+birthdate
+bitmask
+bsonobjectid
+bugfix
+codegen
+customizable
+datagen
+datagenerator
+datagenerators
+datastructures
+datetime
+dco
+definevalue
+dev
+developercertificate
+eg
+enum
+everyhing
+flanders
+formated
+fuzzying
+gh
+githubusercontent
+godoc
+gofmt
+gojsonpointer
+goreportcard
+goswagger
+html
+ietf
+img
+ints
+io
+ipsums
+ivan
+json
+jsonpointer
+jsonschema
+lang
+loren
+md
+multipleOf
+nz
+patternProperties
+preconfigured
+rebase
+rebased
+schemas
+sexualized
+skipFuzzying
+skipTilting
+slackin
+strfmt
+stubmode
+svg
+th
+tiltDefault
+tiltExample
+travis
+unitTest
+withAllValidationChecks
+withDefault
+withEdgeCase
+withExample
+withTilting
+withValidation
+withValidationCheck
+yml