cli could not set object option

[tadelesh]

some config in emitter is an object, and we could only set it in tspconfig.yaml, but could not set it with emitter-name.a.b="c" in cli.

[timotheeguerin]

i thought we allowed that one #4539, we have a test for that

typespec/packages/compiler/test/e2e/cli/cli.e2e.ts

Line 207 in 1b34732

it("set config parameter with --option", async () => {

[tadelesh]

is it work for emitter options? it seems the logic will fall into this if?

typespec/packages/compiler/src/core/cli/actions/compile/args.ts

Line 113 in 1b34732

} else if (optionKeyParts.length > 2) {

[timotheeguerin]

yeah seems like it might just work to interpolate back into the config

[timotheeguerin]

this turns out exposed quite a few issues, fixing them in #6711