feat: enhance schema attribute not found error message

[Peefy]

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

• N
• Y

Closes #527

feat: enhance schema attribute not found error message

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

• kclvm/sema/src/resolver/var.rs
• kclvm/sema/src/resolver/scope.rs

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

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

• test/grammar/schema/var_not_define_fail/var_not_define_fail_0/main.k
• test/grammar/schema/var_not_define_fail/var_not_define_fail_1/main.k

[coveralls]

Pull Request Test Coverage Report for Build 8141326871

Details

• 16 of 17 (94.12%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.004%) to 71.927%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
kclvm/sema/src/resolver/var.rs	15	16	93.75%

Totals
Change from base Build 8139200011:	0.004%
Covered Lines:	44551
Relevant Lines:	61939

---

💛 - Coveralls

[zong-zhe]

LGTM

[He1pa]

lgtm