feat: add APIGetTemplate function and refactor template fetching logic

[ctrlz526]

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Link	CommitId	Status	Reason
Detail	181b0fc	🚫 Skipped	No files need to be tested {"packages/service/core/app/tool/api.ts":"File path does not match include patterns.","packages/templates/register.ts":"File path does not match include patterns.","packages/templates/src/CQ/template.json":"File path does not match include patterns.","packages/templates/src/Chinese/template.json":"File path does not match include patterns.","packages/templates/src/TranslateRobot/template.json":"File path does not match include patterns.","packages/templates/src/animalLife/template.json":"File path does not match include patterns.","packages/templates/src/chatGuide/template.json":"File path does not match include patterns.","packages/templates/src/divination/template.json":"File path does not match include patterns.","packages/templates/src/flux/template.json":"File path does not match include patterns.","packages/templates/src/githubIssue/template.json":"File path does not match include patterns.","packages/templates/src/google/template.json":"File path does …

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