feat: support more keywords and improve conversion results for complex json schema

[jakezhu9]

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

• N
• Y

fix #200

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

pkg/tools/gen

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

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

Support oneOf, allOf and patternProperties keywords, improve conversion results for $ref and so on. Now we shuold get a better result when importing from complex json schema.

I try use it to convert the josn schema of github workflow (pkg/tools/gen/testdata/jsonschema/complex-workflow/expect.k), and use the result to check a workflow (pkg/tools/gen/testdata/yaml/workflow/expect.k). After fixing some attribute name with - (working-directory -> working_directory, runs-on->runs_on), everything works fine!

Of course, the processing of some keywords (such as allOf) is not perfect yet, and we can improve it in the future.

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

[coveralls]

Pull Request Test Coverage Report for Build 7530613143

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.9%) to 63.744%

---

Totals
Change from base Build 7529058980:	0.9%
Covered Lines:	3024
Relevant Lines:	4744

---

💛 - Coveralls

[Peefy]

Good Job! LGTM!

[Peefy]

LGTM