feat: impl builtin template system package

[Peefy]

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

• N
• Y

re #313

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

• kclvm/runtime/Cargo.toml
• kclvm/Cargo.lock
• kclvm/runtime/src/_kclvm.bc
• kclvm/runtime/src/lib.rs
• kclvm/runtime/src/template/mod.rs
• kclvm/sema/src/builtin/system_module.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

Unit test

• kclvm/api/src/service/service_impl.rs
• kclvm/loader/src/snapshots/**
• kclvm/tools/src/LSP/src/completion.rs

Grammar test

• test/grammar/builtins/template/execute_0/main.k
• test/grammar/builtins/template/execute_1/main.k
• test/grammar/builtins/template/html_escape_0/main.k