Add watched words of type "replace" (#12020)

This commit includes other various improvements to watched words.

auto_silence_first_post_regex site setting was removed because it overlapped
with 'require approval' watched words.

config/locales/client.en.yml

@@ -4603,31 +4603,33 @@ en:
         title: "Watched Words"
         search: "search"
         clear_filter: "Clear"
-        show_words: "show words"
-        one_word_per_line: "One word per line"
+        show_words:
+          one: "show %{count} word"
+          other: "show %{count} words"
         download: Download
         clear_all: Clear All
         clear_all_confirm_block: "Are you sure you want to clear all watched words for the Block action?"
         clear_all_confirm_censor: "Are you sure you want to clear all watched words for the Censor action?"
         clear_all_confirm_flag: "Are you sure you want to clear all watched words for the Flag action?"
         clear_all_confirm_require_approval: "Are you sure you want to clear all watched words for the Require Approval action?"
-        word_count:
-          one: "%{count} word"
-          other: "%{count} words"
         actions:
           block: "Block"
           censor: "Censor"
           require_approval: "Require Approval"
           flag: "Flag"
+          replace: "Replace"
         action_descriptions:
           block: "Prevent posts containing these words from being posted. The user will see an error message when they try to submit their post."
           censor: "Allow posts containing these words, but replace them with characters that hide the censored words."
           require_approval: "Posts containing these words will require approval by staff before they can be seen."
           flag: "Allow posts containing these words, but flag them as inappropriate so moderators can review them."
+          replace: "Replace words in posts with other words or links"
         form:
-          label: "New Word:"
+          label: "New Word"
           placeholder: "full word or * as wildcard"
           placeholder_regexp: "regular expression"
+          replacement_label: "Replacement"
+          replacement_placeholder: "example or https://example.com"
           add: "Add"
           success: "Success"
           exists: "Already exists"

config/locales/server.en.yml

@@ -1943,7 +1943,6 @@ en:
     min_first_post_typing_time: "Minimum amount of time in milliseconds a user must type during first post, if threshold is not met post will automatically enter the needs approval queue. Set to 0 to disable (not recommended)"
     auto_silence_fast_typers_on_first_post: "Automatically silence users that do not meet min_first_post_typing_time"
     auto_silence_fast_typers_max_trust_level: "Maximum trust level to auto silence fast typers"
-    auto_silence_first_post_regex: "Case insensitive regex that if passed will cause first post by user to be silenced and sent to approval queue. Example: raging|a[bc]a , will cause all posts containing raging or aba or aca to be silenced on first. Only applies to first post."
     reviewable_claiming: "Does reviewable content need to be claimed before it can be acted upon?"
     reviewable_default_topics: "Show reviewable content grouped by topic by default"
     reviewable_default_visibility: "Don't show reviewable items unless they meet this priority"
@@ -4905,7 +4904,6 @@ en:
       trust_level: "Users at low trust levels must have replies approved by staff. See `approve_unless_trust_level`."
       new_topics_unless_trust_level: "Users at low trust levels must have topics approved by staff. See `approve_new_topics_unless_trust_level`."
       fast_typer: "New user typed their first post suspiciously fast, suspected bot or spammer behavior. See `min_first_post_typing_time`."
-      auto_silence_regexp: "New user whose first post matches the `auto_silence_first_post_regex` setting."
       watched_word: "This post included a Watched Word. See your <a href='%{base_url}/admin/logs/watched_words'>list of watched words</a>."
       staged: "New topics and posts for staged users must be approved by staff. See `approve_unless_staged`."
       category: "Posts in this category require manual approval by staff. See the category settings."

config/site_settings.yml

@@ -1660,7 +1660,6 @@ spam:
   min_first_post_typing_time: 3000
   auto_silence_fast_typers_on_first_post: true
   auto_silence_fast_typers_max_trust_level: 0
-  auto_silence_first_post_regex: ""
   high_trust_flaggers_auto_hide_posts: true
   cooldown_hours_until_reflag:
     default: 24