fix: generate schema for nested object in array

[jakezhu9]

1. Does this PR affect any open issues?(Y/N) and add issue references

• N
• Y

fix #195

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

Fix the issue of missing schema for nested objects in an array when generating KCL from a JSON schema.
To achieve this, we add paths information to the convertContext and use full path as the name of the nested object schema.
It also fixes a potential issue where the generated schema could be wrong when the names of nested object are the same, as now they will have there own unique name.

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 7179073979

• 21 of 21 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 63.973%

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Totals
Change from base Build 7156094195:	0.1%
Covered Lines:	2779
Relevant Lines:	4344

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💛 - Coveralls

[Peefy]

Good Job! LGTM! ❤️