Semantic Snippets Completion

[akhera99]

This is a tracking issue for all the remaining work items in Semantic Snippets.

Original proposal detailing the implementation strategy

• Semantic Snippets #56541

Snippets that have been implemented

• Semantic Snippets - Snippet Working List #64144

Issues blocking snippets from being turned on by default

• C# semantic snippet inserts wrong line endings #67739

• Nested 'for' semantic snippet fails to simplify global::System.Int32 to int #71542

• Semantic snippets don't fallback to VS options properly #71570

Follow-up work

We need to change the behavior from old snippet double-tab command handler to be rerouted and insert the completion semantic snippet instead.

• Semantic Snippets - Route snippet command handler to new semantic snippets #72451

Example contribution pull requests

• Semantic snippets - svm and sim snippets #68854
• Semantic snippets - for and forr snippets #68508