Adding common issues page (#15)

Co-authored-by: 11 <a11@MacBook-Pro-11.local>
Co-authored-by: Harsh Shandilya <me@msfjarvis.dev>

Author: 3 people

docs/users/common-issues.md

@@ -0,0 +1,36 @@
+# Common issues
+
+When you are installing APS you can encounter some issues based on your setup, the most common of them are given below with their fixes.
+
+## OpenKeychain failed to launch
+
+Many OEMs create excessive limitations on background apps to "improve" battery life by breaking normal functionality, the workarounds for those are described [here](./background-killing-bugs.md).
+
+
+# "Error reading input data" [#2653](https://github.com/android-password-store/android-password-store/issues/2653), [#2179](https://github.com/android-password-store/android-password-store/issues/2179)
+
+OpenKeychain doesn't support AEAD encryption (default in gpg 2.3+). Dropping the OCB option from the key's preference string fixes the issue
+
+```plaintext
+$ gpg --edit-key <key-id>
+
+gpg> showpref
+  [ultimate] (1).name <email>
+  Cipher: AES256, AES192, AES, 3DES
+  AEAD: OCB
+  Digest: SHA512, SHA384, SHA256, SHA224, SHA1
+  Compression: ZLIB, BZIP2, ZIP, Uncompressed
+  Features: MDC, AEAD, Keyserver no-modify
+gpg> setpref AES256 AES192 AES 3DES SHA512 SHA384 SHA256 SHA224 SHA1 ZLIB BZIP2 ZIP
+  Set preference list to: Cipher: AES256, AES192, AES, 3DES AEAD: Digest: SHA512, SHA384, SHA256, SHA224, SHA1 Compression: ZLIB, BZIP2, ZIP, Uncompressed Features: MDC, Keyserver no-modify
+  Really update the preferences? (y/N) y 
+gpg> save
+
+$ pass init <key-id>
+```
+
+## "No encrypted data with known key found in stream with newer gopass secrets" [#1530](https://github.com/android-password-store/android-password-store/issues/1530), [#173](https://github.com/android-password-store/android-password-store/issues/173)
+
+This issue caused by option "throw-keyids" which isn't supported by OpenKeychain. To resolve this, you can disable it in two ways:
+  1. Reinit your password storage by command with disabling option "throw-keyids" `PASSWORD_STORE_GPG_OPTS="--no-throw-keyids" pass init $KEYID`
+  2. Edit your gpg config and set `--no-throw-keyids` in it.