docs: don't generate docs for each version of Lua

Each version outputs the exact same docs. This simplifies things. Maybe
in the future there will be a way to emit docs that precisely show what
each target lang can support, but with better comments this will be good
enough.

Author: natecraddock

build.zig

@@ -121,14 +121,7 @@ pub fn build(b: *Build) void {
     const install_docs = b.addInstallDirectory(.{
         .source_dir = docs.getEmittedDocs(),
         .install_dir = .prefix,
-        .install_subdir = switch (lang) {
-            .lua51 => "docs/lua51",
-            .lua52 => "docs/lua52",
-            .lua53 => "docs/lua53",
-            .lua54 => "docs/lua54",
-            .luajit => "docs/luajit",
-            .luau => "docs/luau",
-        },
+        .install_subdir = "docs",
     });
 
     const docs_step = b.step("docs", "Build and install the documentation");

makefile

@@ -12,8 +12,4 @@ test:
 	zig build -Dlang=luau install-example-luau-bytecode
 
 docs:
-	zig build docs -Dlang=lua51
-	zig build docs -Dlang=lua52
-	zig build docs -Dlang=lua53
-	zig build docs -Dlang=lua54
-	zig build docs -Dlang=luau
+	zig build docs

readme.md

@@ -13,12 +13,8 @@ In both cases, Ziglua will compile Lua from source and link against your Zig cod
 Like the Lua C API, the Ziglua API "emphasizes flexibility and simplicity... common tasks may involve several API calls. This may be boring, but it gives us full control over all the details" (_Programming In Lua 4th Edition_). However, Ziglua takes advantage of Zig's features to make it easier and safer to interact with the Lua API.
 
 ## Documentation
-Docs are a work in progress and are automatically generated for each push to main. Most functions and public declarations are documented.
-* [Ziglua for Lua 5.1 Docs](https://natecraddock.github.io/ziglua/lua51/#ziglua.lib.Lua)
-* [Ziglua for Lua 5.2 Docs](https://natecraddock.github.io/ziglua/lua52/#ziglua.lib.Lua)
-* [Ziglua for Lua 5.3 Docs](https://natecraddock.github.io/ziglua/lua53/#ziglua.lib.Lua)
-* [Ziglua for Lua 5.4 Docs](https://natecraddock.github.io/ziglua/lua54/#ziglua.lib.Lua)
-* [Ziglua for Luau Docs](https://natecraddock.github.io/ziglua/luau/#ziglua.lib.Lua)
+Docs are a work in progress and are automatically generated for each push to main. Most functions and public declarations are documented:
+* [Ziglua Docs](https://natecraddock.github.io/ziglua/#ziglua.lib.Lua)
 
 See [docs.md](https://github.com/natecraddock/ziglua/blob/main/docs.md) for more general information on Ziglua and how it differs from the C API.