Add geometric_filter and related crates

.gitignore

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+Cargo.lock
+target/

Cargo.toml

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+[workspace]
+members = [
+    "crates/*",
+]
+resolver = "2"

README.md

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 # rust-gems
-A collection of rust algorithms and data structures
+
+A collection of rust algorithms and data structures:
+
+- `geometric_filter`
+
+- `interval`
+
+- `lock_free`
+
+- `pspack`
+
+- `sha`
+
+- `stable_hash`
+
+- `tree_path`
+
+The crate dependencies:
+
+```mermaid
+stateDiagram-v2
+    direction RL
+
+    geometric_filter --> lock_free
+    geometric_filter --> pspack
+    geometric_filter --> sha
+    geometric_filter --> stable_hash
+
+    interval --> lock_free
+    interval --> pspack
+    interval --> stable_hash
+
+    lock_free --> pspack
+
+    sha --> lock_free
+    sha --> pspack
+    sha --> stable_hash
+
+    tree_path --> interval
+    tree_path --> lock_free
+    tree_path --> pspack
+    tree_path --> stable_hash
+```

crates/geometric_filter/Cargo.toml

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+[package]
+name = "github_geometric_filter"
+version = "0.1.0"
+authors = ["Greg Orzell <[email protected]>", "Vicent Marti <[email protected]>"]
+edition = "2021"
+
+[lib]
+crate-type = ["lib", "staticlib"]
+
+[features]
+test-support = ["rand", "rand_chacha"]
+
+[dependencies]
+github_lock_free = { path = "../lock_free" }
+github_pspack = { path = "../pspack" }
+github_sha = { path = "../sha" }
+github_stable_hash = { path = "../stable_hash" }
+
+dataview = "1.0.1"
+fnv = "1.0"
+hex = "0.4"
+itertools = "0.11"
+once_cell = "1.18"
+rand = { version = "0.8", optional = true }
+rand_chacha = { version = "0.3", optional = true }
+serde = { version = "1.0", features = [ "derive" ] }
+
+[dev-dependencies]
+rand = "0.8"
+rand_chacha = "0.3"