Fix ClojureScript protocol dispatch in Cherry

[willcohen]

Adds externs file to preserve protocol names in runtime and updates compiler to generate full protocol names with cljs.core namespace prefix.

Changes:

• externs/protocols.js: New file with all 54 ClojureScript protocols
• shadow-cljs.edn: Add externs reference
• src/cherry/internal/protocols.cljc: Expand core-protocols set and qualify unqualified protocols in proto-assign-impls

Fixes protocol dispatch between Cherry-compiled deftypes and ClojureScript runtime.

Please answer the following questions and leave the below in as part of your PR.

• This PR corresponds to an issue with a clear problem statement.

• Protocol dispatch fails for ClojureScript protocols in Cherry-compiled deftypes #165

• This PR contains a test to prevent against future regressions

• I have updated the CHANGELOG.md file with a description of the addressed issue.

[willcohen]

Tests are incorrect and don't conform to test suite. Need to redo.

[willcohen]

Test suite reconforms.

[borkdude]

Similar remark here as in the assert PR

[willcohen]

Way simpler now. Just an externs file, adding it to shadow, and a new test under assert.

[willcohen]

Branch now depends on #172 but changelog entry is in here as well.

[borkdude]

Do we really need the big externs file? Why didn't I need them for ISwap etc before? Does the externs file get used by downstream users of cherry (I don't believe so?)

[willcohen]

Hmm. Without the externs, the (correctly invoked) tests now fail at:

FAIL in (protocol-dispatch-test) (cherry/compiler_test.cljs:552:9)
ICounted protocol dispatch on custom deftype
expected: (= 42 (jsv! "(deftype TestBuffer []\n ICounted\n (-count [_] 42))\n(count (TestBuffer.))"))
actual: #object[Error Error: No protocol method ICounted.-count defined for type object: [object Object]]

[borkdude]

Why does it work for ISwap etc then?

[willcohen]

The test re-passes with the new extern file removed, with just an addition of ICounted to externs/cherry.txt: cljs$core$ICounted$_count$arity$1.

Will adjust to add the protocols in there

[willcohen]

Okay -- I added as many user-testable protocols as I could figure out, with notes about all the ones I had to skip either because they were esoterically internal or had no methods.

I had to add protocol_mask$partition alongside the top-level cljs$core$IFoo$ to get the tests to work on about half of them.

Re deftype.cljc, that removal is just fixing a duplication of IPrintWithWriter in the list that I noticed when expanding core-protocols.

[willcohen]

More broadly -- ICounted is the actual thing I'm hitting, but just slapping one additional protocol in felt like a bandaid, and since I saw the todo, I assumed that it'd be helpful to try to just go through all the protocols that are implementable. If you'd prefer for me to shrink it down to just ICounted and deal with the other ones later, that's totally appropriate too and I can shrink this down to just a few lines.