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Describe the bug / provide steps to reproduce it

Introduction

The standard capture nodes and properties for injections, documented here, are not being used by Zed to handle injection queries. Instead, Zed has been using a shorthand for these constructs, namely:

• @language instead of @injection.language
• @content instead of @injection.content
• combined instead of injection.combined
• language instead of injection.language

This means that Zed would not handle injection queries from extensions if they used the proper captures and properties. In fact, this is the case with the existing Java extension https://github.com/samuser107/zed-java-extension/blob/main/languages/java/injections.scm.

Reproduce Steps

1. Confirm what the standard capture nodes and properties for injections by visiting https://tree-sitter.github.io/tree-sitter/syntax-highlighting#language-injection.
2. Go to crates/languages/src/markdown/injections.scm, (also visible on github), and confirm that the captures that markdown is using does not match what is documented.
3. Update crates/languages/src/markdown/injections.scm with the standard captures.
4. Open a markdown file with a code block in Zed, observe that no syntax highlighting takes place.

Alternative Reproduction Step

On the other hand, if you wish to see that Zed is ignoring standard injection.scm written by extension authors,
you can do the following.

1. Download the Java extension
2. Open a java file in Zed and insert a comment block /* */ to trigger injection attempt.
3. With a keen eye you can observe that injections are not taking place, which is difficult because this is a comment block, however, you can make the following updates to see more clearly what is happening.
4. Navigate to /~Library/Application\ Support/zed/installed/extensions/java/grammars/java/injections.scm
5. Update the injection file to inject a more colorful language, like "python" in for comment_block.
6. Add some python code in the comment block in your java file in zed, observe no highlighting.
7. Optional, if you wish to see that the only issue is a small rename, update the injections.scm file in the java extension to match the shorthand captures and properties that zed uses for injections.

PR:

I currently have a PR up #9654, which makes zed use the standard captures, updates the injections.scm files, and updates all tests which reference injection queries (as many as I could grep) to test for the standard captures and props.

Environment

Zed: v0.129.0 (Zed Dev)
OS: macOS 13.4.1
Memory: 32 GiB
Architecture: aarch64

If applicable, add mockups / screenshots to help explain present your vision of the feature

No response

If applicable, attach your ~/Library/Logs/Zed/Zed.log file to this issue.

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