Add method help docs

core/src/main/resources/help/removewalletpassword-help.txt

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+removewalletpassword
+
+NAME
+----
+removewalletpassword - remove a Bisq wallet's encryption password
+
+SYNOPSIS
+--------
+removewalletpassword
+        --wallet-password=<wallet-password>
+        --timeout=<seconds>
+
+DESCRIPTION
+-----------
+Remove an encryption password from an encrypted Bisq wallet.
+
+EXAMPLES
+--------
+$ ./bisq-cli --password=xyz --port=9998 removewalletpassword --wallet-password=mypassword

core/src/main/resources/help/setwalletpassword-help.txt

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+setwalletpassword
+
+NAME
+----
+setwalletpassword - set Bisq wallet password
+
+SYNOPSIS
+--------
+setwalletpassword
+        --wallet-password=<wallet-password>
+        --new-wallet-password=<new-wallet-password>
+
+DESCRIPTION
+-----------
+Encrypts a Bisq wallet with a password.  If the optional new wallet password option is
+present, a new wallet password replaces the existing password
+
+EXAMPLES
+--------
+Encrypt an unencrypted Bisq wallet with a password:
+$ ./bisq-cli --password=xyz --port=9998 setwalletpassword --wallet-password=mypassword
+
+Set a new password on a Bisq wallet that is already encrypted:
+$ ./bisq-cli --password=xyz --port=9998 setwalletpassword --wallet-password=myoldpassword \
+    --new-wallet-password=mynewpassword

core/src/main/resources/help/unlockwallet-help.txt

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+unlockwallet
+
+NAME
+----
+unlockwallet - unlock an encrypted Bisq wallet
+
+SYNOPSIS
+--------
+unlockwallet
+        --wallet-password=<wallet-password>
+        --timeout=<seconds>
+
+DESCRIPTION
+-----------
+Unlocks an encrypted Bisq wallet for a specified number of seconds.
+The timeout can be manually overridden with the lockwallet command.
+
+EXAMPLES
+--------
+Unlock a wallet encrypted with the wallet-password "mypassword" for 30 seconds:
+$ ./bisq-cli --password=xyz --port=9998 unlockwallet --wallet-password=mypassword --timeout=30