Add comprehensive installation and setup documentation

- Add GETTING_STARTED.md with quick start guide and development modes
- Add INSTALL.sh automated installation script
- Add INSTALLATION_CHECKLIST.md, INSTALLATION_SUCCESS.md, and INSTALLATION_SUMMARY.md
- Add QUICK_REFERENCE.md for common commands
- Add SETUP_GUIDE.md with detailed setup instructions
- Update README.md with improved project overview
- Add did-wallet app dependencies and node_modules

apps/web5-dwn/node_modules/browser-level/util/clear.js

@@ -0,0 +1,35 @@
+'use strict'
+
+module.exports = function clear (db, location, keyRange, options, callback) {
+  if (options.limit === 0) return db.nextTick(callback)
+
+  const transaction = db.db.transaction([location], 'readwrite')
+  const store = transaction.objectStore(location)
+  let count = 0
+
+  transaction.oncomplete = function () {
+    callback()
+  }
+
+  transaction.onabort = function () {
+    callback(transaction.error || new Error('aborted by user'))
+  }
+
+  // A key cursor is faster (skips reading values) but not supported by IE
+  // TODO: we no longer support IE. Test others
+  const method = store.openKeyCursor ? 'openKeyCursor' : 'openCursor'
+  const direction = options.reverse ? 'prev' : 'next'
+
+  store[method](keyRange, direction).onsuccess = function (ev) {
+    const cursor = ev.target.result
+
+    if (cursor) {
+      // Wait for a request to complete before continuing, saving CPU.
+      store.delete(cursor.key).onsuccess = function () {
+        if (options.limit <= 0 || ++count < options.limit) {
+          cursor.continue()
+        }
+      }
+    }
+  }
+}

apps/web5-dwn/node_modules/browser-level/util/deserialize.js

@@ -0,0 +1,14 @@
+'use strict'
+
+const textEncoder = new TextEncoder()
+
+module.exports = function (data) {
+  if (data instanceof Uint8Array) {
+    return data
+  } else if (data instanceof ArrayBuffer) {
+    return new Uint8Array(data)
+  } else {
+    // Non-binary data stored with an old version (level-js < 5.0.0)
+    return textEncoder.encode(data)
+  }
+}

apps/web5-dwn/node_modules/browser-level/util/key-range.js

@@ -0,0 +1,20 @@
+/* global IDBKeyRange */
+
+'use strict'
+
+module.exports = function createKeyRange (options) {
+  const lower = options.gte !== undefined ? options.gte : options.gt !== undefined ? options.gt : undefined
+  const upper = options.lte !== undefined ? options.lte : options.lt !== undefined ? options.lt : undefined
+  const lowerExclusive = options.gte === undefined
+  const upperExclusive = options.lte === undefined
+
+  if (lower !== undefined && upper !== undefined) {
+    return IDBKeyRange.bound(lower, upper, lowerExclusive, upperExclusive)
+  } else if (lower !== undefined) {
+    return IDBKeyRange.lowerBound(lower, lowerExclusive)
+  } else if (upper !== undefined) {
+    return IDBKeyRange.upperBound(upper, upperExclusive)
+  } else {
+    return null
+  }
+}