feat(add): Add npm packages to package.json if present (#25477)

Closes #25321

Ended up being a larger refactoring, since we're now juggling
(potentially) two config files in the same `add`, instead of choosing
one. I don't love the shape of the code, but I think it's good enough

Some smaller side improvements:
- `deno remove` supports `jsonc`
- `deno install --dev` will be a really simple change
- if `deno remove` removes the last import/dependency in the
`imports`/`dependencies`/`devDependencies` field, it removes the field
instead of leaving an empty object

Cargo.toml

@@ -193,6 +193,7 @@ url = { version = "< 2.5.0", features = ["serde", "expose_internals"] }
 uuid = { version = "1.3.0", features = ["v4"] }
 webpki-roots = "0.26"
 which = "4.2.5"
+yoke = { version = "0.7.4", features = ["derive"] }
 zeromq = { version = "=0.4.0", default-features = false, features = ["tcp-transport", "tokio-runtime"] }
 zstd = "=0.12.4"
 

cli/Cargo.toml

@@ -161,6 +161,7 @@ typed-arena = "=2.0.2"
 uuid = { workspace = true, features = ["serde"] }
 walkdir = "=2.3.2"
 which.workspace = true
+yoke.workspace = true
 zeromq.workspace = true
 zip = { version = "2.1.6", default-features = false, features = ["deflate-flate2"] }
 zstd.workspace = true