Add configurable word characters

[Zhaoyikaiii]

Summary

Adds a word_characters language setting that lets users configure extra characters considered part of a word for editor selection. With:

{
  "word_characters": ["-"]
}

double-click selection can include foo-bar as one word.

This uses existing language settings merging, so the setting can be defined globally or under languages. Language extension word characters continue to apply through the existing classifier path.

VS Code imports translate editor.wordSeparators into word_characters for ASCII punctuation that VS Code does not treat as a separator.

Validation

• git diff --check
• cargo fmt -p language -p multi_buffer -p editor -p settings -p settings_content --check
• npx prettier --check src/reference/all-settings.md
• cargo check -p settings_content --lib
• cargo check -p language --lib
• cargo test -p language test_surrounding_word_with_extra_word_characters
• cargo test -p settings test_vscode_import
• cargo check -p editor --lib

Release Notes:

• Added word_characters setting for configuring word selection behavior.

[cla-bot]

We require contributors to sign our Contributor License Agreement, and we don't have @Zhaoyikaiii on file. You can sign our CLA at https://zed.dev/cla. Once you've signed, post a comment here that says '@cla-bot check'.

[Zhaoyikaiii]

@cla-bot check

[cla-bot]

The cla-bot has been summoned, and re-checked this pull request!

[Zhaoyikaiii]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 372fed46d6

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[Zhaoyikaiii]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 599b0a3abc

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[Zhaoyikaiii]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Swish!

Reviewed commit: d0a21f6fef

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".