Add Python Path for Windows

[GreasySlug]

Changes proposed in this PR:

• add or fix path
  • Scripts
  • uv
  • poerty
• fix test
  • encoding utf-8

@mtshiba

[mtshiba]

I looked into the cause of the test error, and it seems that it may not be a problem with the Python interpreter selection.
When I ran cargo test without workaround on Windows, I got the following result.

Traceback (most recent call last):
File "<string>", line 1, in <module>
File "examples/helloworld.er", line -1, in <module>
UnicodeEncodeError: 'cp932' codec can't encode character '\u03ac' in position 3: illegal multibyte sequence

I don't remember seeing this error when I wrote this test, but this output may have been obtained as a result of several improvements to make the test results readable.

\u03ac is the Greek letter ά. Indeed, this character is included in the source code. In this test, I wanted to check whether Erg can support multilingual source code, but there may be a codec problem on Windows.

In fact, the test passed when I deleted everything except alphabets and hiragana.

[mtshiba]

It is inconvenient that multilingual support is only available if the user sets it up using sys.stdout.reconfigure!, so I think it would be better to include a process to embed this code when generating the code.
For example, Erg embeds a code in the bytecode that passes its own standard API path and loads it. Using this as a reference, it is possible to call sys.stdout.reconfigure first.

erg/crates/erg_compiler/codegen.rs

Lines 3929 to 3953 in b2fb80c

	fn load_prelude_py(&mut self) {
	self.emit_global_import_items(
	Identifier::static_public("sys"),
	vec![(
	Identifier::static_public("path"),
	Some(Identifier::private("#path")),
	)],
	);
	self.emit_load_name_instr(Identifier::private("#path"));
	self.emit_load_method_instr(Identifier::static_public("append"), BoundAttr);
	self.emit_load_const(erg_core_path().to_str().unwrap());
	self.emit_call_instr(1, BoundAttr);
	self.stack_dec();
	self.emit_pop_top();
	let erg_std_mod = Identifier::static_public("_erg_std_prelude");
	// escaping
	self.emit_global_import_items(
	erg_std_mod.clone(),
	vec![(
	Identifier::static_public("contains_operator"),
	Some(Identifier::private("#contains_operator")),
	)],
	);
	self.emit_import_all_instr(erg_std_mod);
	}