feat(config): add [workspace-]diagnostics fields to statusline

[RoloEdits]

Adds diagnostics and workspace-diagnostics fields to the statusline editor config. This allows you to define a list of severities that will then be rendered in the order of definition:

[editor.statusline]
diagnostics = ["error", "hint", "warning"]
workspace-diagnostics = ["warning", "hint", "error"]

This defaults to:

[editor.statusline]
diagnostics = ["warning", "error"]
workspace-diagnostics = ["warning", "error"]

the current master behavior.

Subsumes: #13256 and #13257

[nik-rev]

Instead, why not have 1 config option (instead of 3) to allow setting where the error, info, warn, and hint will be

# default
diagnostics = ["error", "warn", "info", "hint"]
# reversed
diagnostics = ["hint", "info", "warn", "error"]
# min severity = warn:
diagnostics = ["warn", "error"]

[the-mikedavis]

This seems like a good way to allow configuring this to me 👍. Could you add the new options to the book?

helix/book/src/editor.md

Lines 110 to 118 in 9cfb8af

	| Key | Description | Default |
	| --- | --- | --- |
	| `left` | A list of elements aligned to the left of the statusline | `["mode", "spinner", "file-name", "read-only-indicator", "file-modification-indicator"]` |
	| `center` | A list of elements aligned to the middle of the statusline | `[]` |
	| `right` | A list of elements aligned to the right of the statusline | `["diagnostics", "selections", "register", "position", "file-encoding"]` |
	| `separator` | The character used to separate elements in the statusline | `"│"` |
	| `mode.normal` | The text shown in the `mode` element for normal mode | `"NOR"` |
	| `mode.insert` | The text shown in the `mode` element for insert mode | `"INS"` |
	| `mode.select` | The text shown in the `mode` element for select mode | `"SEL"` |