Add README.

README.md

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+# jobs
+
+Testing different job scheduling and job parsing crates.
+
+## apalis
+
+### PostgreSQL
+
+Create database.
+
+```zsh
+createdb foobar
+```
+
+Run sample program.
+
+```zsh
+DATABASE_URL="postgres://${USER}:passwordifany@localhost/foobar" cargo run --release --bin using-crate-apalis-postgres
+```
+
+### SQLite
+
+Run sample program.
+
+```zsh
+cargo run --release --bin using-crate-apalis-sqlite
+```
+
+## Clokwerk
+
+Run sample program.
+
+```zsh
+cargo run --release --bin using-crate-clokwerk
+```
+
+## Cron
+
+Run sample program.
+
+```zsh
+cargo run --release --bin using-crate-cron
+```
+
+## Cron\_job
+
+Run sample program.
+
+```zsh
+cargo run --release --bin using-crate-cron_job
+```
+
+## Cron\_tab
+
+Run sample programs.
+
+```zsh
+cargo run --release --bin using-crate-cron_tab-sync
+```
+
+```zsh
+cargo run --release --bin using-crate-cron_tab-async
+```
+
+## Croner
+
+Run sample program.
+
+```zsh
+cargo run --release --bin using-crate-croner
+```
+
+## Delay\_timer
+
+Run sample programs.
+
+```zsh
+cargo run --release --bin using-crate-delay_timer-internal
+```
+
+```zsh
+cargo run --release --bin using-crate-delay_timer-in-async-context
+```
+
+## English-to-cron
+
+Run sample program.
+
+```zsh
+cargo run --release --bin using-crate-english-to-cron
+```
+
+## Tokio-cron-scheduler
+
+Run sample programs.
+
+```zsh
+cargo run --release --bin using-crate-tokio-cron-scheduler-simple_job_tokio_in_a_thread
+```
+
+```zsh
+cargo run --release --bin using-crate-tokio-cron-scheduler-simple_job
+```
+
+```zsh
+cargo run --release --bin using-crate-tokio-cron-scheduler-postgres_job
+```