repo: move all source code in crates directory

The top-level listing was just getting a bit too long for my taste. So
put all of the code in one directory and shrink the large top-level mess
to a small top-level mess.

NOTE: This commit only contains renames. The subsequent commit will
actually make ripgrep build again. We do it this way with the naive hope
that this will make it easier for git history to track the renames.
Sigh.

crates/printer/Cargo.toml

@@ -0,0 +1,31 @@
+[package]
+name = "grep-printer"
+version = "0.1.3"  #:version
+authors = ["Andrew Gallant <jamslam@gmail.com>"]
+description = """
+An implementation of the grep crate's Sink trait that provides standard
+printing of search results, similar to grep itself.
+"""
+documentation = "https://docs.rs/grep-printer"
+homepage = "https://github.com/BurntSushi/ripgrep"
+repository = "https://github.com/BurntSushi/ripgrep"
+readme = "README.md"
+keywords = ["grep", "pattern", "print", "printer", "sink"]
+license = "Unlicense/MIT"
+
+[features]
+default = ["serde1"]
+serde1 = ["base64", "serde", "serde_derive", "serde_json"]
+
+[dependencies]
+base64 = { version = "0.11.0", optional = true }
+bstr = "0.2.0"
+grep-matcher = { version = "0.1.2", path = "../grep-matcher" }
+grep-searcher = { version = "0.1.4", path = "../grep-searcher" }
+termcolor = "1.0.4"
+serde = { version = "1.0.77", optional = true }
+serde_derive = { version = "1.0.77", optional = true }
+serde_json = { version = "1.0.27", optional = true }
+
+[dev-dependencies]
+grep-regex = { version = "0.1.3", path = "../grep-regex" }