feat: add vite_shell crate for bash script parsing (#18)

Create a new vite_shell crate that uses ast-grep to parse and split
bash scripts by top-level && operators. The implementation properly
handles operator precedence and mixed operators (|| and &&).

Key features:
- Splits bash scripts by top-level && operators only
- Preserves nested structures (subshells, functions, etc.)
- Correctly handles || operators (left-associative precedence)
- Comprehensive test coverage (12 tests) including edge cases

Examples:
- "a && b && c" → ["a", "b", "c"]
- "a || b && c" → ["a || b", "c"]
- "a && b || c" → ["a && b || c"]

Dependencies:
- ast-grep-core 0.32.2 for AST-based parsing
- tree-sitter-bash 0.23.1 for bash grammar
- thiserror for error handling

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: branchseer

Cargo.lock

@@ -36,6 +36,7 @@ allocator-api2 = { version = "0.2.21", default-features = false, features = ["al
 anyhow = "1.0.98"
 assert2 = "0.3.16"
 assertables = "9.8.1"
+ast-grep-core = "0.32.2"
 attohttpc = { version = "0.30.1", features = ["tls-native", "tls-native-vendored"], default-features = false }
 base64 = "0.22.1"
 bincode = "2.0.1"
@@ -107,6 +108,7 @@ toml = "0.9.5"
 tracing = "0.1.41"
 tracing-error = "0.2.1"
 tracing-subscriber = { version = "0.3.19", features = ["env-filter", "serde"] }
+tree-sitter-bash = "0.23.1"
 tui-term = "0.2.0"
 twox-hash = "2.1.1"
 uuid = "1.18.1"

Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "vite_shell"
+version = "0.0.0"
+authors.workspace = true
+edition.workspace = true
+license.workspace = true
+publish = false
+rust-version.workspace = true
+
+[dependencies]
+ast-grep-core = { workspace = true }
+thiserror = { workspace = true }
+tree-sitter-bash = { workspace = true }
+
+[lints]
+workspace = true