Rename custom-typeshed-dir, target-version and current-directory CLI options (#14930)

## Summary

This PR renames the `--custom-typeshed-dir`, `target-version`, and
`--current-directory` cli options to `--typeshed`,
`--python-version`, and `--project` as discussed in the CLI proposal
document.
I added aliases for `--target-version` (for Ruff compat) and
`--custom-typeshed-dir` (for Alex)

## Test Plan

Long help

```
An extremely fast Python type checker.

Usage: red_knot [OPTIONS] [COMMAND]

Commands:
  server  Start the language server
  help    Print this message or the help of the given subcommand(s)

Options:
      --project <PROJECT>
          Run the command within the given project directory.
          
          All `pyproject.toml` files will be discovered by walking up the directory tree from the project root, as will the project's virtual environment (`.venv`).
          
          Other command-line arguments (such as relative paths) will be resolved relative to the current working directory."#,

      --venv-path <PATH>
          Path to the virtual environment the project uses.
          
          If provided, red-knot will use the `site-packages` directory of this virtual environment to resolve type information for the project's third-party dependencies.

      --typeshed-path <PATH>
          Custom directory to use for stdlib typeshed stubs

      --extra-search-path <PATH>
          Additional path to use as a module-resolution source (can be passed multiple times)

      --python-version <VERSION>
          Python version to assume when resolving types
          
          [possible values: 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13]

  -v, --verbose...
          Use verbose output (or `-vv` and `-vvv` for more verbose output)

  -W, --watch
          Run in watch mode by re-running whenever files change

  -h, --help
          Print help (see a summary with '-h')

  -V, --version
          Print version
```

Short help 

```
An extremely fast Python type checker.

Usage: red_knot [OPTIONS] [COMMAND]

Commands:
  server  Start the language server
  help    Print this message or the help of the given subcommand(s)

Options:
      --project <PROJECT>         Run the command within the given project directory
      --venv-path <PATH>          Path to the virtual environment the project uses
      --typeshed-path <PATH>      Custom directory to use for stdlib typeshed stubs
      --extra-search-path <PATH>  Additional path to use as a module-resolution source (can be passed multiple times)
      --python-version <VERSION>  Python version to assume when resolving types [possible values: 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13]
  -v, --verbose...                Use verbose output (or `-vv` and `-vvv` for more verbose output)
  -W, --watch                     Run in watch mode by re-running whenever files change
  -h, --help                      Print help (see more with '--help')
  -V, --version                   Print version

```

---------

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

crates/red_knot_python_semantic/src/module_resolver/path.rs

@@ -283,9 +283,9 @@ fn query_stdlib_version(
     let Some(module_name) = stdlib_path_to_module_name(relative_path) else {
         return TypeshedVersionsQueryResult::DoesNotExist;
     };
-    let ResolverContext { db, target_version } = context;
+    let ResolverContext { db, python_version } = context;
 
-    typeshed_versions(*db).query_module(&module_name, *target_version)
+    typeshed_versions(*db).query_module(&module_name, *python_version)
 }
 
 /// Enumeration describing the various ways in which validation of a search path might fail.
@@ -658,7 +658,7 @@ mod tests {
         let TestCase {
             db, src, stdlib, ..
         } = TestCaseBuilder::new()
-            .with_custom_typeshed(MockedTypeshed::default())
+            .with_mocked_typeshed(MockedTypeshed::default())
             .build();
 
         assert_eq!(
@@ -779,7 +779,7 @@ mod tests {
     #[should_panic(expected = "Extension must be `pyi`; got `py`")]
     fn stdlib_path_invalid_join_py() {
         let TestCase { db, stdlib, .. } = TestCaseBuilder::new()
-            .with_custom_typeshed(MockedTypeshed::default())
+            .with_mocked_typeshed(MockedTypeshed::default())
             .build();
         SearchPath::custom_stdlib(&db, stdlib.parent().unwrap())
             .unwrap()
@@ -791,7 +791,7 @@ mod tests {
     #[should_panic(expected = "Extension must be `pyi`; got `rs`")]
     fn stdlib_path_invalid_join_rs() {
         let TestCase { db, stdlib, .. } = TestCaseBuilder::new()
-            .with_custom_typeshed(MockedTypeshed::default())
+            .with_mocked_typeshed(MockedTypeshed::default())
             .build();
         SearchPath::custom_stdlib(&db, stdlib.parent().unwrap())
             .unwrap()
@@ -822,7 +822,7 @@ mod tests {
     #[test]
     fn relativize_stdlib_path_errors() {
         let TestCase { db, stdlib, .. } = TestCaseBuilder::new()
-            .with_custom_typeshed(MockedTypeshed::default())
+            .with_mocked_typeshed(MockedTypeshed::default())
             .build();
 
         let root = SearchPath::custom_stdlib(&db, stdlib.parent().unwrap()).unwrap();
@@ -867,11 +867,11 @@ mod tests {
 
     fn typeshed_test_case(
         typeshed: MockedTypeshed,
-        target_version: PythonVersion,
+        python_version: PythonVersion,
     ) -> (TestDb, SearchPath) {
         let TestCase { db, stdlib, .. } = TestCaseBuilder::new()
-            .with_custom_typeshed(typeshed)
-            .with_target_version(target_version)
+            .with_mocked_typeshed(typeshed)
+            .with_python_version(python_version)
             .build();
         let stdlib = SearchPath::custom_stdlib(&db, stdlib.parent().unwrap()).unwrap();
         (db, stdlib)