docs: Add extended v1 changelog

[tatiana-s]

Closes Quantinuum/guppylang#1910

[ss2165]

great summary

[ss2165]

mention what control and dagger to explicitly

[ss2165]

there is a mixture of active voice ("you can") and passive ("it is now possible"), suggest consistent use of passive throughout

[CalMacCQ]

Content looks good. Thanks :)

I have a suggestion about where this page should live. I would prefer that the Extended v1 changlog lives in the changelog page itself. The v1 changelog entry could be linked from the top just like the v1 milestone is currently

Thoughts @ss2165 ?

[CalMacCQ]

Suggested change

Guppy has a new dedicated [`Measurement`](../api/generated/guppylang.std.quantum.Measurement.rst) type. Values returned from measurement functions now have this type instead of returning a `bool` directly. See the [language guide section on measurements](language_guide/measurement.md) for the design rationale behind this and the relevant migration guide section [here](v1_migration.md#the-stdquantummeasure-function-now-returns-a-measurement-rather-than-a-bool).

Guppy has a new dedicated [`Measurement`](api/generated/guppylang.std.quantum.Measurement.rst) type. Values returned from measurement functions now have this type instead of returning a `bool` directly. See the [language guide section on measurements](language_guide/measurement.md) for the design rationale behind this and the relevant migration guide section [here](v1_migration.md#the-stdquantummeasure-function-now-returns-a-measurement-rather-than-a-bool).

[CalMacCQ]

Suggested change

	Guppy now provides the ability to give an existing type another name using the `guppy.type_alias` function. Read more about type aliases in the [language guide](TODO).
	Guppy now provides the ability to give an existing type another name using the `guppy.type_alias` function. Read more about type aliases in the [language guide](language_guide/data_types/aliases.md).

This crossref should work if you merge in main.

[tatiana-s]

Closing in favour of adding it directly to the release changelog