Check for CRLF line endings in CI (#1348)

## The problem

We currently don't have any checks to ensure that we don't use CRLF line
endings, which could result in hard-to-detect issues in our files, as
the difference between LF and CRLF isn't always visible

## The solution

In this PR, we now check that all files that are not binary do not
contain CRLF line endings.

This PR does the following:

- Adds a `pre-commit` rule to ensure that files that text files don't
have CRLF
- Fixes all files in our repo that had CRLF line endings; looks like we
had only missed one file
- Removes an old Rope database file that was floating around in our repo
for some reason. Seemed better to remove it than add a rule for it to
our new `.gitattributes`
- Throws an exception in test case recorder when developer tries to
record a test with line endings as CRLF

## References

- https://adaptivepatchwork.com/2012/03/01/mind-the-end-of-your-line/
-
https://docs.github.com/en/get-started/getting-started-with-git/configuring-git-to-handle-line-endings
- https://git-scm.com/docs/gitattributes

## Checklist

- [ ] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [ ] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [ ] I have not broken the cheatsheet
- [x] Make sure we're checking line endings for files in CI

Author: pokey

.pre-commit-config.yaml

@@ -14,6 +14,10 @@ repos:
         entry: Forbid symlinks
         language: fail
         types: [symlink]
+  - repo: https://github.com/Lucas-C/pre-commit-hooks
+    rev: v1.5.1
+    hooks:
+      - id: forbid-crlf
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.4.0
     hooks:

cursorless-talon/.vscode/.ropeproject/config.py

@@ -1,3 +1,3 @@
-<root>
-    <name id="some id">Some text</name>
-</root>
+<root>
+    <name id="some id">Some text</name>
+</root>

cursorless-talon/.vscode/.ropeproject/objectdb

@@ -323,6 +323,13 @@ export class TestCaseRecorder {
       await this.testCase.recordInitialState();
 
       const editor = ide().activeTextEditor!;
+
+      if (editor.document.getText().includes("\r\n")) {
+        throw Error(
+          "Refusing to record a test when the document contains CRLF line endings.  Please convert line endings to LF.",
+        );
+      }
+
       // NB: We need to copy the editor options rather than storing a reference
       // because its properties are lazy
       this.originalTextEditorOptions = { ...editor.options };