support generate package index page

[amyXia1994]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

feat: support generate package index page

2. What is the scope of this PR (e.g. component or file name):

pkg/tools/gen/gendoc.go
pkg/tools/gen/genopenapi.go
pkg/tools/gen/types.go

pkg/tools/gen/gendoc_test.go
pkg/tools/gen/testdata/doc/...

pkg/tools/gen/templates/doc/packageDoc.gotmpl
pkg/tools/gen/templates/doc/schemaDoc.gotmpl

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• support generate package index page
• support number multiplier
• fix kclType and schemaId evaluation
• add more tests

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

• pkg/tools/gen/gendoc_test.go

[coveralls]

Pull Request Test Coverage Report for Build 5891581314

• 84 of 96 (87.5%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.5%) to 63.034%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/tools/gen/gendoc.go	41	53	77.36%

Files with Coverage Reduction	New Missed Lines	%
pkg/tools/gen/genopenapi.go	1	94.55%

Totals
Change from base Build 5875171191:	0.5%
Covered Lines:	2348
Relevant Lines:	3725

---

💛 - Coveralls

[Peefy]

LGTM