feat(arcanist): add `arbl` and `arho` aliases (#6132)

Closes #6132

plugins/arcanist/README.md

@@ -14,6 +14,7 @@ plugins=(... arcanist)
 | ------- | ---------------------------------- |
 | ara     | `arc amend`                        |
 | arb     | `arc branch`                       |
+| arbl    | `arc bland`                        |
 | arco    | `arc cover`                        |
 | arci    | `arc commit`                       |
 | ard     | `arc diff`                         |
@@ -24,6 +25,7 @@ plugins=(... arcanist)
 | ardpc   | `arc diff --plan-changes`          |
 | are     | `arc export`                       |
 | arh     | `arc help`                         |
+| arho    | `arc hotfix`                       |
 | arl     | `arc land`                         |
 | arli    | `arc lint`                         |
 | arls    | `arc list`                         |

plugins/arcanist/arcanist.plugin.zsh

@@ -5,6 +5,7 @@
 
 alias ara='arc amend'
 alias arb='arc branch'
+alias arbl='arc bland'
 alias arco='arc cover'
 alias arci='arc commit'
 
@@ -17,6 +18,7 @@ alias ardp='arc diff --preview' # creates a new diff in the phab interface
 
 alias are='arc export'
 alias arh='arc help'
+alias arho='arc hotfix'
 alias arl='arc land'
 alias arli='arc lint'
 alias arls='arc list'