[Settings]New Landing Page Experimentation (#22365)

Co-authored-by: Sophia Chen <sophia.six.chen@gmail.com>
Co-authored-by: Niels Laute <niels.laute@live.nl>
Co-authored-by: Sophia Chen <sophchen@microsoft.com>

.github/actions/spell-check/expect.txt

@@ -163,6 +163,7 @@ bricelam
 BRIGHTGREEN
 Browsable
 bsd
+Bson
 bstr
 bthprops
 bti
@@ -221,6 +222,7 @@ CLASSNOTAVAILABLE
 clickable
 clickonce
 CLIENTEDGE
+clientid
 clientside
 CLIPCHILDREN
 Clipperton
@@ -347,6 +349,7 @@ DARKYELLOW
 datareader
 datatemplate
 Datavalue
+dataversion
 DATAW
 davidegiacometti
 Dayof
@@ -1859,6 +1862,7 @@ TRAYMOUSEMESSAGE
 triaging
 TRK
 trl
+TServer
 Tshuapa
 TStr
 Tuva
@@ -1911,6 +1915,7 @@ unmute
 UNORM
 unregistering
 unremapped
+Unstub
 unsubscribe
 unvirtualized
 Updatelayout
@@ -1936,6 +1941,7 @@ UYVY
 vabdq
 validmodulename
 Vanara
+variantassignment
 vcamp
 vccorlib
 vcdl

.github/actions/spell-check/patterns.txt

@@ -62,6 +62,9 @@ https?://(?:(?:www\.|)youtube\.com|youtu.be)/[-a-zA-Z0-9?&=]*
 link\.medium\.com/[a-zA-Z0-9]+
 \bmedium\.com/\@[^/]+/[-\w]+
 
+# experimentation urls
+https?://default\.exp-tas\.com/[-_a-zA-Z0-9/]*
+
 publicKeyToken=(['"]|)[0-9a-f]+\g{-1}
 \@sha256:[0-9a-f]{64}\b