Provide more sugar API on ResourceManager

[MrKou47]

Is your feature request related to a problem? Please describe.
Currently, when a user wants to get the resource instance, they can only use the resourceManager.load API to do this job. Sometimes that is not convenient and easy to make mistakes, especially when the resource path includes specific characters like Chinese, emojis, or spaces, etc.

Describe the solution you'd like

Due to having an Online Editor, providing a ResourceManager.getResourceById() API seems more reasonable and easy to implement.

Additional context
We also need to consider providing ResourceManager.getResourceByPath() as a sugar API for ResourceManager.load, which semantics look suitable in that case.

[MrKou47]

For example, if a resource path includes specific characters like 文件夹/🏠บ้าน/chief Bob .png, in that case engine.resourceManager.load("文件夹/🏠บ้าน/chief Bob .png") seems highly unreliable and unstable. Instead engine.resourceManager.getResourceById("693ee017-2101-4042-a530-f8f866b5caff") looks better.

We could provide a 'Copy Development ID' option for the Asset Panel in the Editor, which is also a general approach to implementing this feature on the user side.