Publish diagnostics even if the file is not saved to disk

[resolritter]

Describe the feature

Feature

I would like to receive diagnostics on the fly as I am editing a file, without having to save it to disk.

Explanation

It understand that v-analyzer collects diagnostics by parsing the compiler's output for a given input_path.

v-analyzer/src/server/inspections/compiler/utils.v

Lines 74 to 75 in 7e11a6f

	mut p := os.new_process(compiler_path)
	p.set_args(['-enable-globals', '-shared', '-check', input_path])

v-analyzer/src/server/inspections/compiler/utils.v

Line 86 in 7e11a6f

output_lines := p.stderr_slurp().split_into_lines().map(term.strip_ansi(it))

v-analyzer/src/server/inspections/compiler/utils.v

Line 90 in 7e11a6f

mut report := parse_compiler_diagnostic(error) or { continue }

I guess that is why the file has to be saved to disk prior to providing the diagnostics.

Use Case

It is annoying to have to constantly save the file only for the sake of getting diagnostics. Many other language servers can provide diagnostics even if the file is not saved to disk.

Other Information

No response