docs(spelling): Add codespell config + github action, run and fix a good number of typos (#3645)

extensions/default/src/DicomWebDataSource/index.js

@@ -343,7 +343,7 @@ function createDicomWebApi(dicomWebConfig, userAuthenticationService) {
       const addRetrieveBulkData = instance => {
         const naturalized = naturalizeDataset(instance);
 
-        // if we konw the server doesn't use bulkDataURI, then don't
+        // if we know the server doesn't use bulkDataURI, then don't
         if (!dicomWebConfig.bulkDataURI?.enabled) {
           return naturalized;
         }

extensions/default/src/DicomWebDataSource/retrieveStudyMetadata.js

@@ -9,7 +9,7 @@ const StudyMetaDataPromises = new Map();
  *
  * @param {Object} server Object with server configuration parameters
  * @param {string} StudyInstanceUID The UID of the Study to be retrieved
- * @param {boolean} enabledStudyLazyLoad Whether the study metadata should be loaded asynchronusly.
+ * @param {boolean} enabledStudyLazyLoad Whether the study metadata should be loaded asynchronously.
  * @param {function} storeInstancesCallback A callback used to store the retrieved instance metadata.
  * @param {Object} [filters] - Object containing filters to be applied on retrieve metadata process
  * @param {string} [filter.seriesInstanceUID] - series instance uid to filter results against