add some snippet (#469)

Author: xiliuya

snippets/gdscript-mode/class

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: class
+# key: cls
+# group: object oriented
+# --
+class ${1:class}:
+    $0

snippets/gdscript-mode/class_name

@@ -0,0 +1,6 @@
+# -*- mode: snippet -*-
+# name: class_name
+# key: clsn
+# group: object oriented
+# --
+class_name ${1:Item} = ${2:"res://icons/item.png"}

snippets/gdscript-mode/const

@@ -0,0 +1,6 @@
+# -*- mode: snippet -*-
+# name: const
+# key: const
+# group: definitions
+# --
+const ${1:name} = $0

snippets/gdscript-mode/enum

@@ -0,0 +1,6 @@
+# -*- mode: snippet -*-
+# name: enum
+# key: enum
+# group: definitions
+# --
+enum $1 {$2}

snippets/gdscript-mode/for

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: for ... in ... : ...
+# key: for
+# group : control structure
+# --
+for ${var} in ${collection}:
+    ${0:pass}

snippets/gdscript-mode/func

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: func
+# key: f
+# group: definitions
+# --
+func ${1:func_name} (${2:param}):
+    ${0:pass}

snippets/gdscript-mode/if

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: if
+# key: if
+# group : control structure
+# --
+if ${1:condition}:
+    ${0:pass}

snippets/gdscript-mode/ife

@@ -0,0 +1,9 @@
+# -*- mode: snippet -*-
+# name: ife
+# key: ife
+# group : control structure
+# --
+if ${1:condition}:
+    ${2:pass}
+else:
+    ${3:pass}

snippets/gdscript-mode/match

@@ -0,0 +1,8 @@
+# -*- mode: snippet -*-
+# name: match
+# key: match
+# group: control structure
+# --
+match ${1:expression}:
+    ${2:pattern}:
+        ${3:pass}

snippets/gdscript-mode/onready

@@ -0,0 +1,6 @@
+# -*- mode: snippet -*-
+# name: onready
+# key: onr
+# group: definitions
+# --
+onready var ${1:name} = $0