docs: Add documentation to a subset of available extensions (#24138)

I was able to use my experience with some of the Deno extensions to
flesh out their documentation a bit

I've provided docs for the following:
- web
- fetch
- net
- webidl
- url
- io
- crypto
- console

---------

Signed-off-by: Richard Carson <Rscarson@rogers.com>

1 files changed, 52 insertions, 1 deletions

diff --git a/ext/url/README.md b/ext/url/README.md
index 519c2823e..ba2bbb4d3 100644
--- a/ext/url/README.md
+++ b/ext/url/README.md
@@ -1,6 +1,57 @@
 # deno_url
 
-This crate implements the URL, and URLPattern APIs for Deno.
+**This crate implements the URL, and URLPattern APIs for Deno.**
 
 URL Spec: https://url.spec.whatwg.org/ URLPattern Spec:
 https://wicg.github.io/urlpattern/
+
+## Usage Example
+
+From javascript, include the extension's source, and assign `URL`, `URLPattern`,
+and `URLSearchParams` to the global scope:
+
+```javascript
+import * as url from "ext:deno_url/00_url.js";
+import * as urlPattern from "ext:deno_url/01_urlpattern.js";
+
+Object.defineProperty(globalThis, "URL", {
+  value: url.URL,
+  enumerable: false,
+  configurable: true,
+  writable: true,
+});
+
+Object.defineProperty(globalThis, "URLPattern", {
+  value: url.URLPattern,
+  enumerable: false,
+  configurable: true,
+  writable: true,
+});
+
+Object.defineProperty(globalThis, "URLSearchParams", {
+  value: url.URLSearchParams,
+  enumerable: false,
+  configurable: true,
+  writable: true,
+});
+```
+
+Then from rust, provide `deno_url::deno_url::init_ops_and_esm()` in the
+`extensions` field of your `RuntimeOptions`
+
+## Dependencies
+
+- **deno_webidl**: Provided by the `deno_webidl` crate
+
+## Provided ops
+
+Following ops are provided, which can be accessed through `Deno.ops`:
+
+- op_url_reparse
+- op_url_parse
+- op_url_get_serialization
+- op_url_parse_with_base
+- op_url_parse_search_params
+- op_url_stringify_search_params
+- op_urlpattern_parse
+- op_urlpattern_process_match_input