feat(cli): add scripts for KeePass password management

- Add `get-pass-from-keepass` script to retrieve passwords from KeePass entries
- Add `save-pass-to-keepass` script to store passwords in KeePass entries
- Update library.md documentation with new KeePass utility functions
- Include usage examples and descriptions for new password management tools

bin/get-pass-from-keepass

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+get-pass-from-keepass() {
+    if [[ -z "$1" ]]; then echo "\$1 is empty."; exit; fi
+    local keepass_entry="$1"
+
+    keepassxc-cli show --show-protected --attributes Password \
+        --key-file "$KEEPASS_DATABASE_KEY_FILE" \
+        "$KEEPASS_DATABASE_FILE" \
+        "$keepass_entry"
+}

bin/save-pass-to-keepass

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+save-dotenv-to-keepass() {
+    if [[ -z "$1" ]]; then echo "\$1 is empty."; exit; fi
+    if [[ -z "$2" ]]; then echo "\$2 is empty."; exit; fi
+    local password="$1"
+    local keepass_entry="$2"
+
+    echo "Save password to keepass entry: $keepass_entry"
+    keepassxc-cli add \
+        --key-file "$KEEPASS_DATABASE_KEY_FILE" \
+        --password "$password" \
+        "$KEEPASS_DATABASE_FILE" \
+        "$KEEPASS_ENTRY"
+}