Reduce wasm size by trimming parser and serialization deps

[KKould]

Summary

• restrict sqlparser usage to the std feature and replace small removed sqlparser AST types locally
• remove typetag/erased-serde/inventory/typeid by serializing evaluator/function signatures and rebuilding from factories/registries
• make tables()/views() return lazy storage iterators and clean up related view drop API

Refs #341

Verification

• cargo fmt --all --check
• git diff --check origin/main..HEAD
• cargo check -p kite_sql --no-default-features
• cargo check -p kite_sql
• cargo test -p kite_sql --lib
• cargo tree -p kite_sql --no-default-features | rg "typetag|erased-serde|inventory|typeid" returned no matches
• cargo build --release --target wasm32-unknown-unknown -p kite_sql --no-default-features

Wasm Size

Measured with:

cargo build --release --target wasm32-unknown-unknown -p kite_sql --no-default-features

Build	Before (origin/main)	After (this PR)	Delta
raw wasm	16,172,075 bytes	10,534,315 bytes	-5,637,760 bytes (-34.9%)
wasm-tools strip	16,083,714 bytes	10,445,954 bytes	-5,637,760 bytes (-35.1%)