refactor: Remove branch specification from sal dependency

- Removed the branch specification from the `sal` dependency in
  `doctree/Cargo.toml` and `webbuilder/Cargo.toml`. This simplifies
  the dependency management and relies on the default branch of the
  repository.
- Updated `.gitignore` to ignore `sccache.log` to prevent it from
  being committed to the repository.
- Updated example commands in `example_commands.sh` to use a different
  collection name (`grid1` instead of `grid_documentation`) for testing
  purposes.  This avoids potential conflicts with pre-existing data.
- Improved code structure and organization in `doctree/src/lib.rs`.

webbuilder/Cargo.toml

@@ -15,7 +15,7 @@ toml = "0.7.3"
 serde = { version = "1.0", features = ["derive"] }
 redis = { version = "0.23.0", features = ["tokio-comp"] }
 tokio = { version = "1.28.0", features = ["full"] }
-sal = { git = "https://git.ourworld.tf/herocode/sal.git", branch = "main" }
+sal = { git = "https://git.ourworld.tf/herocode/sal.git" }
 chacha20poly1305 = "0.10.1"
 blake3 = "1.3.1"
 csv = "1.1"