feat(stdlib): add net/url (#1066)

Added the `net/url` package. This package will be beneficial for
manipulating URLs, for instance, parsing query parameters or for URL
muxing in realms.

depends:
- [x] #1076 
- [x] #1065 

<details><summary>Contributors' checklist...</summary>

- [X] Added new tests, or not needed, or not feasible
- [ ] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [ ] Updated the official documentation or not needed
- [X] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [X] Added references to related issues and PRs
- [ ] Provided any useful hints for running manual tests
- [ ] Added new benchmarks to [generated
graphs](https://gnoland.github.io/benchmarks), if any. More info
[here](https://github.com/gnolang/gno/blob/master/.benchmarks/README.md).
</details>

---------

Signed-off-by: gfanton <8671905+gfanton@users.noreply.github.com>
Co-authored-by: Manfred Touron <94029+moul@users.noreply.github.com>

gnovm/docs/go-gno-compatibility.md

@@ -283,7 +283,7 @@ Additional native types:
 | net/rpc/jsonrpc                             | TBD      |
 | net/smtp                                    | TBD      |
 | net/textproto                               | TBD      |
-| net/url                                     | TBD      |
+| net/url                                     | full     |
 | os                                          | TBD      |
 | os/exec                                     | TBD      |
 | os/signal                                   | TBD      |