fix(notification): word --all confirmations and flag values clearly

notification mark-read --all asked "Marked as read all … ?"; each command now asks in its own words, such as "Pin all unread notifications in your inbox?". The status and type filters list their values in help, the api parameter flags read like gh's, and tea auth login --help aligns its method list.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/auth.go

@@ -130,10 +130,11 @@ On a terminal without a method flag, tea asks for the instance, how to log in, w
 keep the token and whether git should use tea for the instance. Otherwise choose one
 method:
 
-  --with-token           read an access token from stdin, or ask for it on a terminal
-  --oauth, --web         authorize tea in a web browser
-  --ssh-key FILE         sign requests with an SSH private key
-  --ssh-agent-key, --ssh-agent-principal   sign requests with a key in ssh-agent
+  --with-token             read an access token from stdin, or ask for it on a terminal
+  --oauth, --web           authorize tea in a web browser
+  --ssh-key FILE           sign requests with an SSH private key
+  --ssh-agent-key FP       sign requests with the key of fingerprint FP in ssh-agent
+  --ssh-agent-principal P  sign requests with the ssh-agent certificate of principal P
 
 Create a token on the instance under Settings > Applications. Logging in to an account
 that tea already has replaces its stored credential after a confirmation (or with --yes).`,