Use workspace

[taikiy]

Moving our core code to ipa-core/ package and include it as a workspace member. The intention for this PR is to move out more code from ipa-core to their own individual packages.

We run 5 more tests from ipa-macros/ when pre-commit is run.

❯ grep "passed" pre-commit.main.result
test result: ok. 412 passed; 0 failed; 3 ignored; 0 measured; 0 filtered out; finished in 34.45s
test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 1.24s
test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.50s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.87s
test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.16s
test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 58.80s
test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.32s
❯ grep "passed" pre-commit.workspace.result
test result: ok. 412 passed; 0 failed; 3 ignored; 0 measured; 0 filtered out; finished in 27.20s
test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.25s
test result: ok. 0 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.47s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 4.82s
test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.20s
test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 59.56s
test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.29s

[benjaminsavage]

I am not really qualified to review this, as I know next to nothing about setting up Rust projects, but this seems fine to me :). I'll wait for @martinthomson and @akoshelev to take a look.

[akoshelev]

Should be good to go imo. Thanks @taikiy for making this change!