Add Sourcepawn language support

[Sarrus1]

This PR adds a tree-sitter parser and queries for the Sourcepawn programming language.

[the-mikedavis]

Suggested change

	(escape_sequence) @string.escape
	(escape_sequence) @constant.character.escape

the captures should line up with https://docs.helix-editor.com/master/themes.html#syntax-highlighting

[the-mikedavis]

Suggested change

	name: (identifier) @variable.member)
	name: (identifier) @variable.other.member)

[the-mikedavis]

Suggested change

	(int_literal) @number
	(char_literal) @character
	(float_literal) @number.float
	(int_literal) @constant.numeric.integer
	(char_literal) @constant.character
	(float_literal) @constant.numeric.float

[the-mikedavis]

Suggested change

	(bool_literal) @boolean
	(bool_literal) @constant.builtin.boolean

[the-mikedavis]

Suggested change

	"return" @keyword.return
	[
	"if"
	"else"
	"case"
	"default"
	"switch"
	] @keyword.conditional
	[
	"do"
	"while"
	"for"
	"continue"
	"break"
	] @keyword.repeat
	"return" @keyword.control.return
	[
	"if"
	"else"
	"case"
	"default"
	"switch"
	] @keyword.control.conditional
	[
	"do"
	"while"
	"for"
	"continue"
	"break"
	] @keyword.control.repeat

[the-mikedavis]

The trailing newline is missing on a few files: highlights.scm, injections.scm and languages.toml

[the-mikedavis]

Suggested change

	(#lua-match? @constant "^[A-Z][A-Z0-9_]+$"))
	(#match? @constant "^[A-Z][A-Z0-9_]+$"))

#lua-match? is specific to neovim

[the-mikedavis]

These two matches on (identifier) should be at the bottom of the file rather than the top. In neovim the precedence of the queries is the opposite of what it is in Helix (and tree-sitter-cli): in Helix the higher patterns in the file take precedence over the lower ones. So as-written these (identifier) matches will match before any of the patterns below that also match (identifier) like on L7 or L10. You will also want to swap the order of these two matches since the one with the #match? is more specific (so it should be higher precedence) than the one on L1.

[the-mikedavis]

Suggested change

	(preproc_include) @keyword.import
	(preproc_tryinclude) @keyword.import
	(preproc_include) @keyword.control.import
	(preproc_tryinclude) @keyword.control.import

[Sarrus1]

Hello, thank you very much for the feedback.

I should have tested this PR before submitting it, I naively thought that helix queries were fully compatible with the new nvim-tree-sitter queries. Sorry about that.

I will convert it to draft while I fix it.

Is there a way to "easily" test queries?

[the-mikedavis]

We don't have test cases but you can cargo run in the Helix directory on an example file to check your work