Support Restsharp 107 plus

[llimllib]

🚥 FixesKong/httpsnippet#312

🧰 Changes

After version 107, restsharp completely changed their API. This PR fixes the code generator to support the new API.

• also add the escaping function from Escape quotes in headers correctly in all languages Kong/httpsnippet#289
• I think there are probably still escaping bugs here, but it seems to be working Well Enough™

🧬 QA & Testing

To test this, I:

• generated all new fixtures with OVERWRITE_EVERYTHING=true npm run test
• generated a C# hello world project with dotnet new console -o HelloWorld -f net7.0
• installed RestSharp into it with dotnet add package RestSharp]
• ran this script and looked for significant differences between csharp and bash:

#!/usr/bin/env bashset -euxo pipefail
file=Program.cs
mkdir -p fixtures
# for the multipart testprintf"hello"> hello.txt
forfixturein~/readme/httpsnippet/src/targets/csharp/restsharp/fixtures/*;do
rm -f $file# the custom method isn't supportedif [[ $fixture==*custom-method* ]];thencontinue;fi
sed 's,test/fixtures/files/hello.txt,hello.txt,'"$fixture">>$fileprintf'Console.WriteLine("{0}", response.Content);'>>$file
dotnet run $file>"fixtures/$(basename "$fixture".out)"done## now run the bash fixtures for comparisonforfixturein~/readme/httpsnippet/src/targets/shell/curl/fixtures/*;do# the curl for custom-indentation does not work properly, so we need to add# || true
sed 's,test/fixtures/files/hello.txt,hello.txt,'"$fixture"|
bash >"fixtures/$(basename "$fixture".out)"||truedone# then, compare the outputsforfixturein~/readme/httpsnippet/src/targets/http/http1.1/fixtures/*;do
base=$(basename "$fixture")
cs="fixtures/$base.cs.out"
sh="fixtures/$base.sh.out"if [[ !-e$cs ]];thenprintf"Unable to find fixture %s\n""$cs";continue;fiif [[ !-e$cs ]];thenprintf"Unable to find fixture %s\n""$sh";continue;fi
git diff "fixtures/$base.cs.out""fixtures/$base.sh.out"||truedone

[llimllib]

test failures appear to be unrelated to this code

[erunion]

@llimllib I've just updated this branch with the latest, and rebased, main.

[erunion]

lgtm! feel free to merge whenever you'd like and i'll cut a new release

[llimllib]

I think "mostly working" is better than "not at all", so I'll merge this 👍