Add ffigen schema and refer them in example config yaml using modeline

example/c_json/config.yaml

@@ -1,3 +1,5 @@
+# yaml-language-server: $schema=../../ffigen.schema.json
+
 output: 'cjson_generated_bindings.dart'
 name: 'CJson'
 description: 'Holds bindings to cJSON.'

example/ffinative/config.yaml

@@ -1,3 +1,5 @@
+# yaml-language-server: $schema=../../ffigen.schema.json
+
 name: NativeLibrary
 ffi-native:
   # asset: 'assetname' # (optional)
@@ -7,4 +9,4 @@ headers:
   entry-points:
     - 'headers/example.h'
 preamble: |
-  // ignore_for_file: deprecated_member_use
+  // ignore_for_file: deprecated_member_use

example/libclang-example/config.yaml

@@ -1,3 +1,5 @@
+# yaml-language-server: $schema=../../ffigen.schema.json
+
 output: 'generated_bindings.dart'
 
 # This will sort the bindings alphabetically.

example/objective_c/config.yaml

@@ -1,3 +1,5 @@
+# yaml-language-server: $schema=../../ffigen.schema.json
+
 name: AVFAudio
 description: Bindings for AVFAudio.
 language: objc

example/shared_bindings/ffigen_configs/a.yaml

@@ -2,6 +2,8 @@
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
+# yaml-language-server: $schema=../../../ffigen.schema.json
+
 name: NativeLibraryA
 description: Bindings to `headers/a.h`.
 output: '../lib/generated/a_gen.dart'

example/shared_bindings/ffigen_configs/a_shared_base.yaml

@@ -2,6 +2,8 @@
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
+# yaml-language-server: $schema=../../../ffigen.schema.json
+
 name: NativeLibraryASharedB
 description: Bindings to `headers/a.h` with shared definitions from `headers/base.h`.
 output: '../lib/generated/a_shared_b_gen.dart'

example/shared_bindings/ffigen_configs/base.yaml

@@ -2,6 +2,8 @@
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
+# yaml-language-server: $schema=../../../ffigen.schema.json
+
 name: NativeLibraryBase
 description: Bindings to `headers/base.h`.
 output:

example/simple/config.yaml

@@ -1,3 +1,5 @@
+# yaml-language-server: $schema=../../ffigen.schema.json
+
 name: NativeLibrary
 description: Bindings to `headers/example.h`.
 output: 'generated_bindings.dart'

example/swift/config.yaml

@@ -1,3 +1,5 @@
+# yaml-language-server: $schema=../../ffigen.schema.json
+
 name: SwiftLibrary
 description: Bindings for swift_api.
 language: objc