chore: migrate to workspace structure and 3-file CI pipeline at toolkit 4.9.6

Signed-off-by: Jeremiah Russell <jerry@jrussell.ie>

crates/cull-gmail/Cargo.toml

@@ -0,0 +1,62 @@
+[package]
+name = "cull-gmail"
+description = "Cull emails from a gmail account using the gmail API"
+version = "0.1.4"
+edition.workspace = true
+authors.workspace = true
+rust-version.workspace = true
+license.workspace = true
+repository.workspace = true
+keywords.workspace = true
+categories.workspace = true
+readme = "README.md"
+include = [
+    "**/*.rs",
+    "Cargo.toml",
+    "README.md",
+    "LICENSE-MIT",
+    "LICENSE-APACHE",
+    "CHANGELOG.md",
+    "docs",
+]
+
+[dependencies]
+base64.workspace = true
+chrono.workspace = true
+clap.workspace = true
+clap-verbosity-flag.workspace = true
+config.workspace = true
+dialoguer.workspace = true
+env_logger.workspace = true
+flate2.workspace = true
+google-gmail1.workspace = true
+hyper-rustls.workspace = true
+indicatif.workspace = true
+lazy-regex.workspace = true
+log.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+thiserror.workspace = true
+tokio.workspace = true
+toml.workspace = true
+
+[dev-dependencies]
+assert_cmd.workspace = true
+assert_fs.workspace = true
+futures.workspace = true
+httpmock.workspace = true
+predicates.workspace = true
+temp-env.workspace = true
+tempfile.workspace = true
+tokio-test.workspace = true
+
+[lints]
+workspace = true
+
+[lib]
+name = "cull_gmail"
+path = "src/lib.rs"
+
+[[bin]]
+name = "cull-gmail"
+path = "src/cli/main.rs"