Add initial version of Rust client for durable (#14)

* initial rust initialization

* added pre-commit

* set up sqlx and rust

* added license files and initial migration;

* added initial impl of client

* tests compile

* fixed bugs with sqlx types

* added documentation

* added tests

* updated tasks

* added a test that mocks the example in README

* removed todos

* added convenience methods for uuid, rand, now

* added handling for spawning and joining subtasks from workflows

* added missing sql and test files

* merged migrations

* cleaned up bad code

* cleaned up json handling

* made process exit optional on too-long tasks

* fixed semaphore ordering

* fixed issues with clock skew

* improved handling of leases

* added comments on sql schema

* enforced that claim timeouts must be set

* cleaned up and documented sql

* added support for transactions that enqueue tasks

* added a bunch of tests

* documented and tested event semantics

* added benchmarks

* removed queue name option

* oops forgot a comment

* handled open-sourcing

* changed language around absurd to be more clear

Author: virajmehta

.gitignore

@@ -19,3 +19,17 @@ target
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
+
+# Added by cargo
+
+/target
+
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+#/target
+.claude/
+.envrc

.pre-commit-config.yaml

@@ -0,0 +1,41 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
+    hooks:
+      - id: check-added-large-files
+        args: ["--maxkb=1024"]
+      - id: check-case-conflict
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-merge-conflict
+      - id: check-symlinks
+      - id: check-toml
+      - id: check-vcs-permalinks
+      - id: check-xml
+      - id: check-yaml
+      - id: detect-private-key
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+
+  - repo: local
+    hooks:
+      - id: cargo-deny
+        name: cargo deny
+        entry: cargo deny check
+        language: system
+        types: [rust]
+        pass_filenames: false
+
+      - id: cargo-fmt
+        name: cargo fmt
+        entry: cargo fmt -- --check
+        language: system
+        types: [rust]
+        pass_filenames: false
+
+      - id: cargo-clippy
+        name: cargo clippy
+        entry: cargo clippy --all-targets --all-features -- -D warnings
+        language: system
+        types: [rust]
+        pass_filenames: false