Feature: tinyTikTok 项目管理

**Is your feature request related to a problem? Please describe.**
利用 Makefile 进行高效的项目管理。

**Describe the solution you'd like**
- [x] build: Build source code for host platform
- [x] clean: Remove all files that are created by building
- [x] lint: Check syntax and styling of go sources
- [ ] test: Run unit test
- [ ] cover: Run unit test and get test coverage
- [x] format: Gofmt (reformat) package sources (exclude vendor dir if existed)
- [ ] gen: Generate all necessary files, such as swagger document
- [x] dependencies: Install necessary dependencies
- [x] tools: Install dependent tools
- [x] help: Show this help info

**Describe alternatives you've considered**
None.

**Additional context**
None.

Start by inspecting the repository's Makefile and Go source tree, then compare the listed targets with the project's current commands. Run the available build, lint, and format targets first; done means the requested test, cover, and gen targets, along with the listed management targets, work consistently.

Written by the indexing model from the issue text.