docs(request): add blob() and formData() (#370)

In sync with honojs/hono#2841

api/request.md

@@ -128,7 +128,7 @@ const body = await c.req.parseBody({ dot: true })
 
 ## json()
 
-Parse Request body of type `application/json`
+Parses the request body of type `application/json`
 
 ```ts
 app.post('/entry', async (c) => {
@@ -139,7 +139,7 @@ app.post('/entry', async (c) => {
 
 ## text()
 
-Parse Request body of type `text/plain`
+Parses the request body of type `text/plain`
 
 ```ts
 app.post('/entry', async (c) => {
@@ -150,7 +150,7 @@ app.post('/entry', async (c) => {
 
 ## arrayBuffer()
 
-Parse Request body as an `ArrayBuffer`
+Parses the request body as an `ArrayBuffer`
 
 ```ts
 app.post('/entry', async (c) => {
@@ -159,6 +159,28 @@ app.post('/entry', async (c) => {
 })
 ```
 
+## blob()
+
+Parses the request body as a `Blob`.
+
+```ts
+app.post('/entry', async (c) => {
+  const body = await c.req.blob()
+  ...
+})
+```
+
+## formData()
+
+Parses the request body as a `FormData`.
+
+```ts
+app.post('/entry', async (c) => {
+  const body = await c.req.formData()
+  ...
+})
+```
+
 ## valid()
 
 Get the validated data.