refactor!: rename hseries to qsystem (#703)

Closes #701 

Kept the `tket2-hseries` package name the same because it is internal
only and already published.

BREAKING CHANGE: all references to "hseries" including extension,
modules and structs renamed to "qsystem"

Cargo.toml

@@ -26,9 +26,9 @@ missing_docs = "warn"
 [patch.crates-io]
 
 # Uncomment to use unreleased versions of hugr
-hugr-core = { git = "https://github.com/CQCL/hugr.git" }
-hugr = { git = "https://github.com/CQCL/hugr.git" }
-hugr-cli = { git = "https://github.com/CQCL/hugr.git" }
+hugr-core = { git = "https://github.com/CQCL/hugr.git" , rev = "7177c5f26c2ddf506d9987c84cf1899275d391d6"}
+hugr = { git = "https://github.com/CQCL/hugr.git" , rev = "7177c5f26c2ddf506d9987c84cf1899275d391d6"}
+hugr-cli = { git = "https://github.com/CQCL/hugr.git" , rev = "7177c5f26c2ddf506d9987c84cf1899275d391d6"}
 
 [workspace.dependencies]
 

tket2-exts/src/tket2_exts/__init__.py

@@ -17,8 +17,8 @@ def futures() -> Extension:
 
 
 @functools.cache
-def hseries() -> Extension:
-    return load_extension("tket2.hseries")
+def qsystem() -> Extension:
+    return load_extension("tket2.qsystem")
 
 
 @functools.cache