Add pre-stable support for create on Windows (#51895)

Adds initial support for flutter create of apps and plugins. This is derived from the current FDE example app and sample plugin, adding template values where relevant.

Since the APIs/tooling/template aren't stable yet, the app template includes a version marker, which will be updated each time there's a breaking change. The build now checks that the template version matches the version known by that version of the tool, and gives a specific error message when there's a mismatch, which improves over the current breaking change experience of hitting whatever build failure the breaking change causes and having to figure out that the problem is that the runner is out of date. It also adds a warning to the create output about the fact that it won't be stable.

Plugins don't currently have a version marker since in practice this is not a significant problem for plugins yet the way it is for runners; we can add it later if that changes.

Fixes #30704

.gitattributes

@@ -15,8 +15,17 @@
 *.yaml   text
 
 # Make sure that these Windows files always have CRLF line endings in checkout
-*.bat    text eol=crlf
-*.ps1    text eol=crlf
+*.bat             text eol=crlf
+*.ps1             text eol=crlf
+*.rc              text eol=crlf
+*.sln             text eol=crlf
+*.props           text eol=crlf
+*.vcxproj         text eol=crlf
+*.vcxproj.filters text eol=crlf
+# Including templatized versions.
+*.sln.tmpl        text eol=crlf
+*.props.tmpl      text eol=crlf
+*.vcxproj.tmpl    text eol=crlf
 
 # Never perform LF normalization on these files
 *.ico    binary