chore(docs): use local images in docs files (#2239)

* update image

* use local images

---------

Co-authored-by: Ilya Maroz <moroz.ilya.olegovich@gmail.com>
Co-authored-by: Peter Savchenko <specc.dev@gmail.com>

docs/api.md

@@ -180,7 +180,7 @@ this.api.notifier.show({
 });
 ```
 
-![](https://capella.pics/14fcdbe4-d6eb-41d4-b66e-e0e86ccf1a4b.jpg)
+![](assets/14fcdbe4-d6eb-41d4-b66e-e0e86ccf1a4b.jpg)
 
 
 Check out [`codex-notifier` package page](https://github.com/codex-team/js-notifier) on GitHub to find docs, params and examples.
@@ -203,8 +203,6 @@ After executing the `destroy` method, editor inctance becomes an empty object. T
 
 Methods for showing Tooltip helper near your elements. Parameters are the same as in [CodeX Tooltips](http://github.com/codex-team/codex.tooltips) lib.
 
-![](https://capella.pics/00e7094a-fdb9-429b-8015-9c56f19b4ef5.jpg)
-
 #### Show
 
 Method shows tooltip with custom content on passed element

docs/releases.md

@@ -33,7 +33,7 @@ There is a [workflow](.github/workflows/publish-package-to-npm.yml) that fired o
 
 Use target version changelog as a description.
 
-![](https://capella.pics/57267bab-f2f0-411b-a9d1-69abee6abab5.jpg)
+![](assets/57267bab-f2f0-411b-a9d1-69abee6abab5.jpg)
 
 Then you can publish the release and wait for package publishing via action.
 
@@ -44,7 +44,7 @@ This package version will be published to NPM with default `latest` tag.
 If you want to publish release candidate version, use suffix `-rc.*` for package
 version in package.json file and in tag on releases page. Workflow will detect it and mark a release as "pre-release".
 
-![](https://capella.pics/796de9eb-bbe0-485c-bc8f-9a4cb76641b7.jpg)
+![](assets/796de9eb-bbe0-485c-bc8f-9a4cb76641b7.jpg)
 
 This package version will be published to NPM with `next` tag.
 

docs/tools-inline.md

@@ -129,8 +129,6 @@ Read more about Sanitizer configuration at the [Tools#sanitize](tools.md#sanitiz
 You can pass your Tool's title via `title` static getter. It can be used, for example, in the Tooltip with 
 icon description that appears by hover. 
 
-![](https://capella.pics/00e7094a-fdb9-429b-8015-9c56f19b4ef5.jpg)
-
 ```ts
 export default class BoldInlineTool implements InlineTool {
   /**

docs/tools.md

@@ -410,7 +410,7 @@ static get sanitize() {
 
 Editor.js has a Conversion Toolbar that allows user to convert one Block to another.
 
-![](https://capella.pics/6c1f708b-a30c-4ffd-a427-5b59a1a472e0.jpg)
+![](assets/6c1f708b-a30c-4ffd-a427-5b59a1a472e0.jpg)
 
 1. You can add ability to your Tool to be converted. Specify «export» property of `conversionConfig`.
 2. You can add ability to convert other Tools to your Tool. Specify «import» property of `conversionConfig`.

docs/usage.md

@@ -17,12 +17,12 @@ So how to use the Editor after [Installation](installation.md).
  
 - Select text fragment and apply a style or insert a link from the Inline Toolbar
 
-![](https://capella.pics/7ccbcfcd-1c49-4674-bea7-71021468a1bd.jpg)
+![](assets/7ccbcfcd-1c49-4674-bea7-71021468a1bd.jpg)
 
 - Use «three-dots» button on the right to open Block Settings. From here, you can move and delete a Block 
 or apply Tool's settings, if it provided. For example, set a Heading level or List style.
 
-![](https://capella.pics/01a55381-46cd-47c7-b92e-34765434f2ca.jpg)    
+![](assets/01a55381-46cd-47c7-b92e-34765434f2ca.jpg)   
 
 ## Shortcuts