Fix exotic fold range kinds (#49151)

Follow-up of https://github.com/zed-industries/zed/pull/48611

Despite Zed not declaring such support in its capabilities,


https://github.com/zed-industries/zed/blob/82a34f780c10388398a53d761434c705db812211/crates/lsp/src/lsp.rs#L1010-L1016

`json-language-server` returns `object` as a folding range kind:

<img width="1728" height="720" alt="bad"
src="https://github.com/user-attachments/assets/ee574879-8657-41c8-ab12-562f3882f057"
/>

The spec, even 3.18, does not really seem to allow it explicitly:
https://microsoft.github.io/language-server-protocol/specifications/lsp/3.18/specification/#foldingRangeKind

but mentions that the real type

> The type is a string since the value set is extensible

The PR adds a capture enum variant for such cases, to get the folds in
instead of failing on deserialization.

See also: https://github.com/zed-industries/lsp-types/pull/10

Release Notes:

- Fixed `json-language-server` document folds not being parsed correctly

Cargo.lock

@@ -9720,7 +9720,7 @@ dependencies = [
 [[package]]
 name = "lsp-types"
 version = "0.95.1"
-source = "git+https://github.com/zed-industries/lsp-types?rev=fb6bcad59522455a041b7eb9579f706e5cfb2d6f#fb6bcad59522455a041b7eb9579f706e5cfb2d6f"
+source = "git+https://github.com/zed-industries/lsp-types?rev=a4f410987660bf560d1e617cb78117c6b6b9f599#a4f410987660bf560d1e617cb78117c6b6b9f599"
 dependencies = [
  "bitflags 1.3.2",
  "serde",

Cargo.toml

@@ -559,7 +559,7 @@ libc = "0.2"
 libsqlite3-sys = { version = "0.30.1", features = ["bundled"] }
 linkify = "0.10.0"
 log = { version = "0.4.16", features = ["kv_unstable_serde", "serde"] }
-lsp-types = { git = "https://github.com/zed-industries/lsp-types", rev = "fb6bcad59522455a041b7eb9579f706e5cfb2d6f" }
+lsp-types = { git = "https://github.com/zed-industries/lsp-types", rev = "a4f410987660bf560d1e617cb78117c6b6b9f599" }
 mach2 = "0.5"
 markup5ever_rcdom = "0.3.0"
 metal = "0.29"