build: generate various resources at build run, not build graph

This is stomping towards minimizing our build.zig dependencies so that
it can be cached more often. Right now, touching almost any file in the
project forces the build.zig to rebuild which is destroying my
productivity.

src/config/sublime_syntax.zig

@@ -1,51 +0,0 @@
-const std = @import("std");
-const Config = @import("Config.zig");
-
-const Template = struct {
-    const header =
-        \\%YAML 1.2
-        \\---
-        \\# See http://www.sublimetext.com/docs/syntax.html
-        \\name: Ghostty Config
-        \\file_extensions:
-        \\  - ghostty
-        \\scope: source.ghostty
-        \\
-        \\contexts:
-        \\  main:
-        \\    # Comments
-        \\    - match: '^\s*#.*$'
-        \\      scope: comment.line.number-sign.ghostty
-        \\
-        \\    # Keywords
-        \\    - match: '\b(
-    ;
-    const footer =
-        \\)\b'
-        \\      scope: keyword.other.ghostty
-        \\
-    ;
-};
-
-/// Check if a field is internal (starts with underscore)
-fn isInternal(name: []const u8) bool {
-    return name.len > 0 and name[0] == '_';
-}
-
-/// Generate keywords from Config fields
-fn generateKeywords() []const u8 {
-    @setEvalBranchQuota(5000);
-    var keywords: []const u8 = "";
-    const config_fields = @typeInfo(Config).@"struct".fields;
-
-    for (config_fields) |field| {
-        if (isInternal(field.name)) continue;
-        if (keywords.len > 0) keywords = keywords ++ "|";
-        keywords = keywords ++ field.name;
-    }
-
-    return keywords;
-}
-
-/// Complete Sublime syntax file content
-pub const syntax = Template.header ++ generateKeywords() ++ Template.footer;

src/config/vim.zig

@@ -1,117 +0,0 @@
-const std = @import("std");
-const Config = @import("Config.zig");
-
-/// This is the associated Vim file as named by the variable.
-pub const syntax = comptimeGenSyntax();
-pub const ftdetect =
-    \\" Vim filetype detect file
-    \\" Language: Ghostty config file
-    \\" Maintainer: Ghostty <https://github.com/ghostty-org/ghostty>
-    \\"
-    \\" THIS FILE IS AUTO-GENERATED
-    \\
-    \\au BufRead,BufNewFile */ghostty/config,*/ghostty/themes/* set ft=ghostty
-    \\
-;
-pub const ftplugin =
-    \\" Vim filetype plugin file
-    \\" Language: Ghostty config file
-    \\" Maintainer: Ghostty <https://github.com/ghostty-org/ghostty>
-    \\"
-    \\" THIS FILE IS AUTO-GENERATED
-    \\
-    \\if exists('b:did_ftplugin')
-    \\  finish
-    \\endif
-    \\let b:did_ftplugin = 1
-    \\
-    \\setlocal commentstring=#\ %s
-    \\setlocal iskeyword+=-
-    \\
-    \\" Use syntax keywords for completion
-    \\setlocal omnifunc=syntaxcomplete#Complete
-    \\
-    \\let b:undo_ftplugin = 'setl cms< isk< ofu<'
-    \\
-    \\if !exists('current_compiler')
-    \\  compiler ghostty
-    \\  let b:undo_ftplugin .= " makeprg< errorformat<"
-    \\endif
-    \\
-;
-pub const compiler =
-    \\" Vim compiler file
-    \\" Language: Ghostty config file
-    \\" Maintainer: Ghostty <https://github.com/ghostty-org/ghostty>
-    \\"
-    \\" THIS FILE IS AUTO-GENERATED
-    \\
-    \\if exists("current_compiler")
-    \\  finish
-    \\endif
-    \\let current_compiler = "ghostty"
-    \\
-    \\CompilerSet makeprg=ghostty\ +validate-config\ --config-file=%:S
-    \\CompilerSet errorformat=%f:%l:%m,%m
-    \\
-;
-
-/// Generates the syntax file at comptime.
-fn comptimeGenSyntax() []const u8 {
-    comptime {
-        var counting_writer = std.io.countingWriter(std.io.null_writer);
-        try writeSyntax(&counting_writer.writer());
-
-        var buf: [counting_writer.bytes_written]u8 = undefined;
-        var stream = std.io.fixedBufferStream(&buf);
-        try writeSyntax(stream.writer());
-        const final = buf;
-        return final[0..stream.getWritten().len];
-    }
-}
-
-/// Writes the syntax file to the given writer.
-fn writeSyntax(writer: anytype) !void {
-    try writer.writeAll(
-        \\" Vim syntax file
-        \\" Language: Ghostty config file
-        \\" Maintainer: Ghostty <https://github.com/ghostty-org/ghostty>
-        \\"
-        \\" THIS FILE IS AUTO-GENERATED
-        \\
-        \\if exists('b:current_syntax')
-        \\  finish
-        \\endif
-        \\
-        \\let b:current_syntax = 'ghostty'
-        \\
-        \\let s:cpo_save = &cpo
-        \\set cpo&vim
-        \\
-        \\syn iskeyword @,48-57,-
-        \\syn keyword ghosttyConfigKeyword
-    );
-
-    const config_fields = @typeInfo(Config).@"struct".fields;
-    inline for (config_fields) |field| {
-        if (field.name[0] == '_') continue;
-        try writer.print("\n\t\\ {s}", .{field.name});
-    }
-
-    try writer.writeAll(
-        \\
-        \\
-        \\syn match ghosttyConfigComment /^\s*#.*/ contains=@Spell
-        \\
-        \\hi def link ghosttyConfigComment Comment
-        \\hi def link ghosttyConfigKeyword Keyword
-        \\
-        \\let &cpo = s:cpo_save
-        \\unlet s:cpo_save
-        \\
-    );
-}
-
-test {
-    _ = syntax;
-}