Fix two auto-indent issues with Markdown and YAML (#20193)

Closes #13376
Closes #13338

Release Notes:

- Fixed unhelpful auto-indent suggestions in markdown.
- Added `auto_indent_on_paste` setting, which can be used on a
per-language basis, to configure whether indentation should be adjusted
when pasting. This setting is enabled by default for languages other
than YAML and Markdown.

crates/languages/src/markdown/config.toml

@@ -12,5 +12,7 @@ brackets = [
     { start = "`", end = "`", close = false, newline = false },
 ]
 
+auto_indent_on_paste = false
+auto_indent_using_last_non_empty_line = false
 tab_size = 2
 prettier_parser_name = "markdown"

crates/languages/src/yaml/config.toml

@@ -10,6 +10,7 @@ brackets = [
     { start = "'", end = "'", close = true, newline = false, not_in = ["string"] },
 ]
 
+auto_indent_on_paste = false
 auto_indent_using_last_non_empty_line = false
 increase_indent_pattern = ":\\s*[|>]?\\s*$"
 prettier_parser_name = "yaml"