Restructure crates

Get rid of the arbitrary bin/lib split and instead move as much as
possible into the bin crate, which becomes the main crate again.

The types and NBT handling are moved into separate crates, so they can
be reused by nbtdump and regiondump.

src/bin/minedmap/main.rs

@@ -1,65 +0,0 @@
-//! The minedmap generator renders map tile images from Minecraft save data
-
-#![warn(missing_docs)]
-#![warn(clippy::missing_docs_in_private_items)]
-
-mod common;
-mod metadata_writer;
-mod region_group;
-mod region_processor;
-mod tile_mipmapper;
-mod tile_renderer;
-
-use minedmap_core as core;
-
-use std::path::PathBuf;
-
-use anyhow::{Context, Result};
-use clap::Parser;
-
-use common::Config;
-use metadata_writer::MetadataWriter;
-use region_processor::RegionProcessor;
-use tile_mipmapper::TileMipmapper;
-use tile_renderer::TileRenderer;
-
-/// Command line arguments for minedmap
-#[derive(Debug, Parser)]
-pub struct Args {
-	/// Number of parallel threads to use for processing
-	///
-	/// If not given, only a single thread is used. Pass 0 to
-	/// use one thread per logical CPU core.
-	#[arg(short, long)]
-	pub jobs: Option<usize>,
-	/// Minecraft save directory
-	pub input_dir: PathBuf,
-	/// MinedMap data directory
-	pub output_dir: PathBuf,
-}
-
-/// Configures the Rayon thread pool for parallel processing
-fn setup_threads(num_threads: usize) -> Result<()> {
-	rayon::ThreadPoolBuilder::new()
-		.num_threads(num_threads)
-		.build_global()
-		.context("Failed to configure thread pool")
-}
-
-fn main() -> Result<()> {
-	let args = Args::parse();
-	let config = Config::new(&args);
-
-	setup_threads(config.num_threads)?;
-
-	let rt = tokio::runtime::Builder::new_current_thread()
-		.build()
-		.unwrap();
-
-	let regions = RegionProcessor::new(&config).run()?;
-	TileRenderer::new(&config, &rt, &regions).run()?;
-	let tiles = TileMipmapper::new(&config, &regions).run()?;
-	MetadataWriter::new(&config, &tiles).run()?;
-
-	Ok(())
-}