Tweak .editorconfig and line endings

- Use `lf` line endings everywhere. This works fine even on Windows, and is more common for git repos. It also matches prettier's default.

For .editorconfig:

- Remove `insert_final_newline = false`: Omitting the final newline isn't supported by prettier or rustfmt.
- Remove `trim_trailing_whitespace = false`: The formatters will remove trailing whitespace anyways. I can't think of a good reason to want to keep trailing whitespace.
- Remove other redundant options.

.editorconfig

@@ -2,22 +2,9 @@ root = true
 
 [*]
 charset = utf-8
-end_of_line = crlf
+end_of_line = lf
 indent_size = 2
 indent_style = space
-insert_final_newline = false
 max_line_length = 120
 tab_width = 2
-trim_trailing_whitespace = false
-
-[*.rs]
-max_line_length = 100
-indent_size = 2
-insert_final_newline = true
-trim_trailing_whitespace = true
-
-[{*.ats,*.cts,*.mts,*.ts}]
-indent_size = 2
-
-[*.json]
-indent_size = 2
+trim_trailing_whitespace = true

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

src-tauri/rustfmt.toml

@@ -1,3 +1,4 @@
+newline_style = "Unix"
 tab_spaces = 2
 use_field_init_shorthand = true
 use_try_shorthand = true