Update isort to 7.0.0 for Python 3.14 compatibility

[Copilot]

Python 3.14 removed ast.Str, ast.Num, ast.Bytes, ast.NameConstant, and ast.Ellipsis (deprecated since 3.8). The bundled isort 6.1.0 still references these classes internally, causing the LSP server to crash on Python 3.14 interpreters.

Changes

Dependencies

• Pin isort>=7.0.0 in requirements.in
• Regenerate requirements.txt (removes importlib-metadata, exceptiongroup, zipp - no longer needed by isort 7.x)

Version constraints

• Update MIN_VERSION in bundled/tool/lsp_server.py: "5.10.1" → "7.0.0"
• Update README.md and NOTICE.txt to reflect shipped version

isort 7.0.0 removes all references to deprecated AST node types via PyCQA/isort#2433 and PyCQA/isort#2425.

Original prompt

Problem

Issue #479 reports that the vscode-isort extension crashes on Python 3.14 with:

ImportError: cannot import name 'Str' from 'ast'

Python 3.14 removed the deprecated ast.Str, ast.Num, ast.Bytes, ast.NameConstant, and ast.Ellipsis classes (deprecated since Python 3.8). The currently bundled isort==6.1.0 still references these removed classes internally, causing the server to crash repeatedly when users have Python 3.14 set as their interpreter.

Solution

Update the bundled isort dependency from 6.1.0 to 7.0.0 or later. The isort 7.0.0 release includes explicit Python 3.14 compatibility fixes (PRs #2433 and #2425 in PyCQA/isort).

Steps

1. Update requirements.in to pin isort>=7.0.0 (currently it just says isort with no version constraint).
2. Recompile requirements.txt by running:

   uv pip compile --generate-hashes --upgrade -o ./requirements.txt ./requirements.in
   

3. Update MIN_VERSION in bundled/tool/lsp_server.py (line 86) from "5.10.1" to the new minimum version if appropriate.
4. Update any references to the old isort version in NOTICE.txt or other files if needed.
5. Ensure the extension still works correctly with isort 7.x (the LSP server invokes isort as a module and parses its stdout/stderr output).

Fixes #479

This pull request was created from Copilot chat.

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