Refactor GDScript/C# script templates logic to be editor-only

Not a full refactor as it still goes through ScriptLanguage so it's hacky,
but at least it can now compile without this.

modules/gdscript/editor/script_templates/CharacterBody2D/basic_movement.gd

@@ -0,0 +1,30 @@
+# meta-description: Classic movement for gravity games (platformer, ...)
+
+extends _BASE_
+
+
+const SPEED = 300.0
+const JUMP_VELOCITY = -400.0
+
+# Get the gravity from the project settings to be synced with RigidDynamicBody nodes.
+var gravity: int = ProjectSettings.get_setting("physics/2d/default_gravity")
+
+
+func _physics_process(delta: float) -> void:
+	# Add the gravity.
+	if not is_on_floor():
+		velocity.y += gravity * delta
+
+	# Handle Jump.
+	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
+		velocity.y = JUMP_VELOCITY
+
+	# Get the input direction and handle the movement/deceleration.
+	# As good practice, you should replace UI actions with custom gameplay actions.
+	var direction := Input.get_axis("ui_left", "ui_right")
+	if direction:
+		velocity.x = direction * SPEED
+	else:
+		velocity.x = move_toward(velocity.x, 0, SPEED)
+
+	move_and_slide()

modules/gdscript/editor/script_templates/CharacterBody3D/basic_movement.gd

@@ -0,0 +1,33 @@
+# meta-description: Classic movement for gravity games (FPS, TPS, ...)
+
+extends _BASE_
+
+
+const SPEED = 5.0
+const JUMP_VELOCITY = 4.5
+
+# Get the gravity from the project settings to be synced with RigidDynamicBody nodes.
+var gravity: float = ProjectSettings.get_setting("physics/3d/default_gravity")
+
+
+func _physics_process(delta: float) -> void:
+	# Add the gravity.
+	if not is_on_floor():
+		velocity.y -= gravity * delta
+
+	# Handle Jump.
+	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
+		velocity.y = JUMP_VELOCITY
+
+	# Get the input direction and handle the movement/deceleration.
+	# As good practice, you should replace UI actions with custom gameplay actions.
+	var input_dir := Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down")
+	var direction := (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
+	if direction:
+		velocity.x = direction.x * SPEED
+		velocity.z = direction.z * SPEED
+	else:
+		velocity.x = move_toward(velocity.x, 0, SPEED)
+		velocity.z = move_toward(velocity.z, 0, SPEED)
+
+	move_and_slide()

modules/gdscript/editor/script_templates/EditorPlugin/plugin.gd

@@ -0,0 +1,13 @@
+# meta-description: Basic plugin template
+@tool
+extends EditorPlugin
+
+
+func _enter_tree() -> void:
+	# Initialization of the plugin goes here.
+	pass
+
+
+func _exit_tree() -> void:
+	# Clean-up of the plugin goes here.
+	pass

modules/gdscript/editor/script_templates/EditorScript/basic_editor_script.gd

@@ -0,0 +1,8 @@
+# meta-description: Basic editor script template
+@tool
+extends EditorScript
+
+
+# Called when the script is executed (using File -> Run in Script Editor).
+func _run() -> void:
+	pass

modules/gdscript/editor/script_templates/Node/default.gd

@@ -0,0 +1,13 @@
+# meta-description: Base template for Node with default Godot cycle methods
+
+extends _BASE_
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass

modules/gdscript/editor/script_templates/Object/empty.gd

@@ -0,0 +1,3 @@
+# meta-description: Empty template suitable for all Objects
+
+extends _BASE_

modules/gdscript/editor/script_templates/SCsub

@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+
+Import("env")
+
+import editor.template_builders as build_template_gd
+
+env["BUILDERS"]["MakeGDTemplateBuilder"] = Builder(
+    action=env.Run(build_template_gd.make_templates, "Generating GDScript templates header."),
+    suffix=".h",
+    src_suffix=".gd",
+)
+
+# Template files
+templates_sources = Glob("*/*.gd")
+
+env.Alias("editor_template_gd", [env.MakeGDTemplateBuilder("templates.gen.h", templates_sources)])

modules/gdscript/editor/script_templates/VisualShaderNodeCustom/basic.gd

@@ -0,0 +1,50 @@
+# meta-description: Visual shader's node plugin template
+
+@tool
+class_name VisualShaderNode_CLASS_
+extends _BASE_
+
+
+func _get_name() -> String:
+	return "_CLASS_"
+
+
+func _get_category() -> String:
+	return ""
+
+
+func _get_description() -> String:
+	return ""
+
+
+func _get_return_icon_type() -> int:
+	return PORT_TYPE_SCALAR
+
+
+func _get_input_port_count() -> int:
+	return 0
+
+
+func _get_input_port_name(port: int) -> String:
+	return ""
+
+
+func _get_input_port_type(port: int) -> int:
+	return PORT_TYPE_SCALAR
+
+
+func _get_output_port_count() -> int:
+	return 1
+
+
+func _get_output_port_name(port: int) -> String:
+	return "result"
+
+
+func _get_output_port_type(port: int) -> int:
+	return PORT_TYPE_SCALAR
+
+
+func _get_code(input_vars: Array[String], output_vars: Array[String],
+		mode: int, type: int) -> String:
+	return output_vars[0] + " = 0.0;"