refactor(strings)!: remove codec from AddOptions

BREAKING CHANGE:

Removes `codec` from AddOptions for `@helia/strings.add`. Anyone relying
on this option currently would have to encode, hash, and import the data
using helia's blockstore (unless implemented by another helia importer
e.g. `@helia/json` or `@helia/dag-cbor`) in order to receive the same
CID as before.

This changes @helia/strings to act more like the other helia importers.

packages/strings/src/index.ts

@@ -40,7 +40,6 @@ export interface StringsComponents {
 
 export interface AddOptions extends AbortOptions, ProgressOptions<PutBlockProgressEvents> {
   hasher: MultihashHasher
-  codec: BlockCodec<any, unknown>
 }
 
 export interface GetOptions extends AbortOptions, ProgressOptions<GetBlockProgressEvents> {
@@ -105,8 +104,7 @@ class DefaultStrings implements Strings {
   async add (string: string, options: Partial<AddOptions> = {}): Promise<CID> {
     const buf = uint8ArrayFromString(string)
     const hash = await (options.hasher ?? sha256).digest(buf)
-    const codec = options.codec ?? raw
-    const cid = CID.createV1(codec.code, hash)
+    const cid = CID.createV1(raw.code, hash)
 
     await this.components.blockstore.put(cid, buf, options)
 

packages/strings/test/get.spec.ts

@@ -2,7 +2,6 @@
 
 import { expect } from 'aegir/chai'
 import { MemoryBlockstore } from 'blockstore-core'
-import * as json from 'multiformats/codecs/json'
 import { identity } from 'multiformats/hashes/identity'
 import { strings, type Strings } from '../src/index.js'
 import type { Blockstore } from 'interface-blockstore'
@@ -34,13 +33,4 @@ describe('get', () => {
 
     await expect(str.get(cid)).to.eventually.equal(input)
   })
-
-  it('gets a string with a non-default block codec', async () => {
-    const input = 'hello world'
-    const cid = await str.add(input, {
-      codec: json
-    })
-
-    await expect(str.get(cid)).to.eventually.equal(input)
-  })
 })